USD $55
These rules are in new/excellent condition, and are perfect for beginners. Available with either a transparent plastic case, or the two-part grey case, both include the original instruction manual.
This rule features all-black scales that are self-documenting on the right side, and instructions printed on the back, which is perfect for those just learning to use a slide rule.
(12 scales, 3 cursor lines, metric ruler)
Front – A, [B, C] D
Back – Instructions
Stock: 5
USD $129
An unusual business rule in new condition, with original instruction manual, but missing its case. Scales are engraved and filled with red/black, as well as being self-documenting on the right side of the rule. Features an imperial rule on the upper edge, and specialist scales for currency conversion, and unit/measure conversions.
(12 scales, inch ruler)
Front – DF, [CF, CI, C] D, L, sh/d, £
Back – [LL1, LL2, C] + Reference data
Stock: 1
USD $115
12″/10″ Full Size late production System Darmstadt Mannheim Slide Rule.
Faber’s advanced Mannheim rule. This rule has a plastic body, with fine black and red filled and engraved scales, plus 1 side cursor and scale (L). Has a 5 line cursor. This is a very nice design, with a 2-sided cursor. Has the Rietz over-range scale extensions, scales are self-documenting.
This rule has formulas and handy constants on the rear, and side inch ruler. This rule has two specialist scales on the lower edge for specialist electrical work.
(13 Scales, 5 cursor lines, in ruler)
Front – LL2, A, [ B, CI, C, ] D, LL3, 2 specialist scales
Back – [S, L, T] + Formulas and reference data
Stock: 2
USD $45
NIB, mint condition student/beginner rule with the original box, case, and manual (English). Scales are self-documenting on the right side of the rule. Features a metric ruler on the upper edge, and operating instructions on the reverse side of the rule.
(4 scales, 3 cursor lines, 1 ruler (inches))
Front – A, [B, C] D
Back – Instructions
Stock: 1
USD $125
Mint condition rule with the original green plastic display case, support rule, and English manual. Scales are engraved and filled with red/black, as well as being self-documenting on the right side of the rule. Features an imperial rule on the upper edge.
(10 scales, 5 cursor lines, 1 ruler (inches))
Front – K, A, [B, CI, C] D, L
Back – Blank [S, ST, T]
Stock: 1
USD $165
The 400g is a Stadia Topography specialty plastic body rule, featuring engraved black/red scale markings that are self-documenting on the right. This rule comes with the original display case which has minor scuffing and marking, but is in good condition. The rule itself has no scale bleeding and is in mint condition.
(13 scales, imperial ruler)
Front – L, A, [B, CI, C] D, P, S, T
Back – 4 specialized topographic scales, instructions and data tables
Stock: 1
USD $150
12″ / 10″ Power Log Exponential Log Log Duplex Slide Rule
White (Traditional) (T) coated aluminum construction, black and red scales, dual log scale design in one of Pickett’s most powerful rules. This is a very sophisticated 32 scale rule, made in the trademark aluminum body format by Pickett, with a less cluttered layout than the N4, but extremely powerful.
This rule and case are in good condition with some marking and wear on the case, including the name of a previous owner marked on the interior flap of the case. Includes original belt loop.
(32 scales)
Front – 2 sq. root scales, K, A, [ B, ST, S, T1, T2, CI, C, ] D, DI, 3 cube root scales
Back – LL0+, LL0-, LL1+, LL1-, DF [ CF, CIF, Ln, L, CI, C, ] D, LL2+, LL2-, LL3+, LL3-
Stock: 1
USD $165
12″ / 10″ Power Log Exponential Log Log Duplex Slide Rule
White (Traditional) (T) coated aluminum construction, black and red scales, dual log scale design in one of Pickett’s most powerful rules. This is a very sophisticated 32 scale rule, made in the trademark aluminum body format by Pickett, with a less cluttered layout than the N4, but extremely powerful.
These rules are in very good condition, with wear to the oxblood finish cases (with belt loop).
(32 scales)
Front – 2 sq. root scales, K, A, [ B, ST, S, T1, T2, CI, C, ] D, DI, 3 cube root scales
Back – LL0+, LL0-, LL1+, LL1-, DF [ CF, CIF, Ln, L, CI, C, ] D, LL2+, LL2-, LL3+, LL3-
Stock: 2
USD $85
12″/10″ Full Size Slide Rule.
A beginner rule from Faber, featuring 5 cursor lines, a metric ruler on the upper edge, and a reversible slide with additional scales. Unlike the new/mint examples of this rule available, these rules come with a variety of different cases in non-mint condition, and do not necessarily come with complete manuals, or all standard FC features (e.g. do not uniformly have green scale contrast indicators, and black/red engraved scale markings).
(10 scales, 5 cursor lines, metric ruler)
Front – K, A,[B, CI, C] D, L
Back – [S, ST, T] Data tables
Stock: 3
USD $185
12″ / 10″ Power Log Exponential Log Log Duplex Slide Rule
White (Traditional) (T) coated aluminum construction, black and red scales, dual log scale design in one of Pickett’s most powerful rules. This is a very sophisticated 32 scale rule, made in the trademark aluminum body format by Pickett, with a less cluttered layout than the N4, but extremely powerful. This set has the black finish case with pen holders and name window, as well as a belt loop.
(32 scales)
Front – 2 sq. root scales, K, A, [ B, ST, S, T1, T2, CI, C, ] D, DI, 3 cube root scales
Back – LL0+, LL0-, LL1+, LL1-, DF [ CF, CIF, Ln, L, CI, C, ] D, LL2+, LL2-, LL3+, LL3-
Stock: 1
USD $159
12″/10″ Full Size Slide Rule.
A beginner rule from Faber, featuring 5 cursor lines, a metric ruler on the upper edge, and a reversible slide with additional scales. Comes with the original two-piece plastic case, and instruction manual (Danish or Norwegian – we think). Features the famous FC green scale contrast indicators, and black/red engraved scale markings.
(10 scales, 5 cursor lines, metric ruler)
Front – K, A,[B, CI, C] D, L
Back – [S, ST, T]
Stock: 1
USD $59
12″/10″ Full Size Slide Rule.
A beginner rule from Faber, featuring 5 cursor lines, an imperial ruler on the upper edge, and a reversible slide with additional scales. Comes with the original two-piece plastic case, and English instruction manual. Features the famous FC green scale contrast indicators, and black/red engraved scale markings. Moderate scale bleeding.
(10 scales, 5 cursor lines, imperial ruler)
Front – LL2, A, [B, CI, C] D, LL3
Back – [S, L, T]
Stock: 1
USD $65
12″/10″ Full Size Slide Rule
This is a very early, wood body, rule from Faber Castell prior to the advent of widely standardised scale markings. It features an imperial ruler along the upper edge, and a metric ruler on the lower edge, along with data charts and instructions on the revers side. Includes the original carton, two-piece case, and an English language instruction manual.
(8 Scales, 2 rulers)
Front – 5 scales
Back – [sin, lg, tg]
Stock: 1
USD $85
12″/10″ Full Size Novo-Duplex Slide Rule.
An advanced duplex log log rule, widely used in Europe, but seldom seen in North America. This rule has a plastic body, black and red filled and engraved scales, plus green accent stripes. This is a powerful design, with the Rietz over-range scale extensions, Pythagorean scale (P), and 6 log log scales. Scales are all self-documenting on the right hand side, and the rule has a 3/5 line cursor.
(24 Scales, 3/5 cursor lines)
Front – K, T1, T2, DF, [CF, CIF, CI, C] D, S, ST, P
Back – LL03, LL02, LL01, A, [B, L, CI, C] D, LL1, LL2, LL3
Stock: 1
USD $65
2″/10″ precision Slide Rule
A versatile and comprehensive beginner/student duplex rule featuring a two-part plastic case, pink color accent stripes on primary scales, and black/red scale marking. The rule is self documenting on right hand side for all scales. A very good quality rule, this example has visible scale bleeding, and marking on the body, but it still verr usable.
(21 Scales, 3 cursor lines)
Front – L, K, A, [B, CI, C] D, LL1, LL2, LL3
Back – T1, T2, DF, [CF, CIF, CI, C] D, S, ST, P
Stock: 1
USD $49
12″/10″ Full Size Slide Rule.
A beginner rule from Faber, featuring 5 cursor lines, a metric ruler on the upper edge, and a reversible slide with additional scales. Comes with the original clear plastic slip case, and English instruction manual.
(10 scales, 5 cursor lines, metric ruler)
Front – K, A, [B, CI, C] D, L
Back – [S, ST, T]
Stock: 1
USD $69
12″/10″ Full Size Slide Rule.
One of Faber Castell’s student/beginner rules for those learning to use a slide rule, but requiring robust functionality. Comes with the original clear plastic slip case, and English instruction manual.
This rule features graphic instructions on the reverse side on how to use the rule.
(8 scales, 5 cursor lines, imperial ruler)
Front – A, DF, [CF, CIF, CI, C] D, K
Back – Instructions
Stock: 1
USD $215
12″/10″ Full Size late production System Darmstadt Mannheim Slide Rule.
This is a rare variant of Faber’s advanced Mannheim rule, widely used in Europe, and features a stylus operated Addiator on the reverse side of the rule, along with reference data and formulas. This rule has a plastic body, with fine black and red filled and engraved scales, plus 1 side cursor and scale (L). Has a 5 line cursor. This is a very nice design, with a 2-sided cursor.
Has the Rietz over-range scale extensions, plus the Pythagorean scale (P), side log scale on the bottom edge. Slide reverse has 3 log log scales (ex), and two rear cursor windows. Scales are self-documenting.
This rule has formulas and handy constants on the rear, and side cm ruler. Enjoyable to use, and lovely to look at, every surface has been used to do something useful.
(13 Scales, 5 cursor lines, imperial ruler)
Front – K, A, [ B, CI, C, ] D, P, S, T
Back – LL1, LL2, LL3, Instructions, Addiator, reference data.
Stock: 1
USD $135
12″ / 10″ Log Log Exponential Duplex Slide Rule
EARLY ROUNDED CORNER MODEL. Yellow (ES) coated aluminum construction, black scales. This is a very sophisticated rule, made in the trademark aluminum body format by Pickett, and comes with the original leather case with belt loop.
(22 Scales)
Front – LL2+0.1, LL2-0.1, DF [ CF, CIF, L, CI, C ] D, LL3+1.0, LL3-1.0
Back – LL1+0.01, LL1-0.01, A, [ B, ST, T, S, C ] D, DI, K
Stock: 1
USD $95
12″/10″ Full Size Elektro Mannheim Slide Rule.
Faber’s famous Elektro rule in the late production version, with an all plastic body, and rear operating data. This rule has the Rietz over-range scale extensions dynamo/volt scales, log log scales and an edge K scale (very interesting). Scales are self documenting on the right hand side.
(13 Scales, 5 cursor lines, 1 ruler)
Front – LL2, A, [ B, CI, C, ] D, LL3, Dynamo, Volt
Back – S, L, T, plus Conversions.
Edge – K scale
Stock: 1
USD $120
12″/10″ Full Size Aristo Multilog Slide Rule.
One of Aristo’s high end professional rules, very popular in Europe. This rule has a plastic body, with filled and engraved black and red scales, metal end-braces (as opposed to the plastic braces with rubber padded feet), with yellow accent stripes (a bit faded) on reference scales, plus scales are self-documenting on right hand side. Has the Rietz over-range scale extensions, plus anti-skid bottom bumpers, and 6 line cursor. Includes Log Log, folded and DI scales.
These are used rules, with the rules being in very good condition, and the cases being in poor condition (marking, wear, stains, etc).
(24 scales, 6 cursor lines)
Front – LL00, K, A, [ B, T, ST, S, C, ] D, DI, LL0
Back – LL01, LL02, LL03, DF,[ CF, CIF, L, CI, C, ] D, LL3, LL2, LL1
Stock: 3
USD $125
12″/10″ Full Size Aristo Darmstadt Slide Rule.
One of Aristo’s high end simplex rules, very popular in Europe. This rule has an engineering plastic body, with filled and engraved black and red scales, plus scales are self-documenting on right hand side. Has the Rietz over-range scale extensions, plus 4 line cursor. Includes Log Log, Pythagorean (P) and BI scales.
A classic Aristo design and beautifully thought out rule, all pieces are in excellent condition.
(14 scales, 1 ruler, 4 cursor lines)
Front – cm/ K, A, [ B, BI, CI, C, ] D, P, S, T
Back – [ L, LL3, LL2, LL1 ]
Stock: 6
USD $85
The Model 99 is a more basic student rule designed for beginners and more non-exhaustive use that doesn’t require advanced trig scales. Features engraved and filled black/red scales, an all plastic body, and four cursor lines.
(10 Scales, 4 Cursor Lines, 2 rulers)
Front – K, A, [B, CI, C] D, L, imperial ruler
Back – [S, ST, T], metric ruler
Stock: 2
USD $110
A spectacularly well designed rule for commerce and accounting. Featuring red/black scales, anti-slip rubber feet on the reverse side, and red-scaled transparent rulers on the upper and lower edges.
Includes case, manual, and support rule (Aristo 1361) with conversion factors.
(14 Scales)
Front – KZ, T2, [P2, P1, T1, Z] M, £, s/d
Back – [ZZ3, ZZ2, ZZ1, ZZ%, T1]
Stock: 3
USD $149
12″/10″ Full Size Aristo Multilog Slide Rule.
One of Aristo’s high end professional rules, very popular in Europe. This rule has an engineering plastic body, with filled and engraved black and red scales, with yellow accent stripes (a bit faded) on reference scales, plus scales are self-documenting on right hand side. Has the Rietz over-range scale extensions, plus anti-skid bottom bumpers, and 6 line cursor. Includes Log Log, folded and DI scales.
A classic Aristo design and beautifully thought out rule.
(Incredible 24 scales! 6 cursor lines)
Front – LL00, K, A, [ B, T, ST, S, C, ] D, DI, LL0
Back – LL01, LL02, LL03, DF,[ CF, CIF, L, CI, C, ] D, LL3, LL2, LL1
Stock: 1
USD $85
Later production example of this advance MultiTrig rule, featuring red/black scales, and the standard Aristo yellow accent coloring on the rule body stators that run the full length of the rue rule. This example does not feature the rubber stand-off feet on either side, but does include two support rules featuring metric and imperial rulers, and conversion factors.
(17 Scales + 4 Cursor Lines)
Front – K, DF, [CF, CIF, CI, C] D, L
Back – P, A, [B, T, ST, S, C] D, DI
Stock: 1
USD $75
An excellent example of the MultiTrig series, featuring red/black scales, rubber stand-off feet on both sides, and the standard Aristo yellow accent coloring on the rule body stators.
Includes a set of Aristo slide rule stands. A very functional and attractive full size rule for advanced users.
(17 Scales + 4 Cursor Lines)
Front – K, DF, [CF, CIF, CI, C] D, L
Back – P, A, [B, T, ST, S, C] D, DI
Stock: 1
USD $210
NEW, Factory Boxed Set, including box, case, rule, and manual (English). The rule has a 4 line cursor, plus two color (red/black) scale markings with yellow accent coloring on the rule body stators. A very functional and attractive full size rule for advanced users.
(23 Scales + 4 Cursor Lines)
Front – ST, T1, T2, DF, [CF, CIF, CI, C], D, P, S
Back – LL01, LL02, LL03, A, [B, L, K, C] D, LL3, LL2, LL1
Stock: 8
USD $185
12.5″/10″ Special Purpose Full Size Slide Rule
This special late production Foxboro flow rule is used to calculate flow parameters and rates for liquids, steam or gas. This is the version custom made for Foxboro by Hemmi of Japan, and has black engraved and filled scales, with color coded pipe schedules for easy operation.
The reverse side of the rule features detailed usage instructions. Rule is in good condition, case is in poor condition.
Stock: 1
USD $245
This special late production Foxboro flow rule is used to calculate flow parameters and rates for liquids, steam or gas. This is the version custom made for Foxboro by Hemmi of Japan, and has red, blue and black engraved and filled scales.
Pipe schedules are color coded for easy operation. The unusual design uses many dedicated scales sets on both sides, and includes the fitted factory box and manual, and gold embossed leather case, all in MINT condition!
It’s a rule you will really enjoy in your collection, or on the job doing steam or hydraulic pipe fitting.
Stock: 1
USD $175
10″ Sun/Hemmi Electronics and Communications Slide Rule Powerful, new full sized rule with leather case, engraved black/red scales, adjustable bamboo body, framed glass cursor. An uncommon and useful rule.
These rules and cases are in very good condition.
(19 Scales)
FRONT – db, Neper, DF [ CF, CIF, CI, C, ] D, LL3, LL2, LL1
BACK – A, L, [ C, SI, TI ] D, Lambda, F
Stock: 2
USD $150
10″ Sun/Hemmi Electronics and Communications Slide Rule Powerful, new full sized rule with leather case, engraved black/red scales, adjustable bamboo body, framed glass cursor. An uncommon and useful rule.
These rules are in good condition, and come with their original leather cases, which are in poor condition.
(19 Scales)
FRONT – db, Neper, DF [ CF, CIF, CI, C, ] D, LL3, LL2, LL1
BACK – A, L, [ C, SI, TI ] D, Lambda, F
Stock: 2
USD $125
10″ Sun/Hemmi Electronics and Communications Slide Rule Powerful, new full sized rule with leather case, engraved black/red scales, adjustable bamboo body, framed glass cursor. An uncommon and useful rule.
Rule is in fair condition, cardboard case is damaged and shows signs of heavy wear.
(19 Scales)
FRONT – db, Neper, DF [ CF, CIF, CI, C, ] D, LL3, LL2, LL1
BACK – A, L, [ C, SI, TI ] D, Lambda, F
Stock: 1
USD $395
10″ Sun/Hemmi Electronics Slide Rule
This is a more advanced version of the 256 Electronics & Communications rule, with leather case, engraved black/red scales, adjustable bamboo body, framed glass cursor. This is an uncommon rule, with dedicated scales for calculating capacitance, induction, and resistance.
Rule is in mint condition, and includes its original, green, leather case.
(21 Scales)
FRONT- LL/3, LL/2, LL2, A, [B, BI, CI, C] D, dB / L, S, T
BACK- F, P [Q, L, C, Cf, Cz] L, Z, Lambda
Stock: 1
USD $29
This is an introductory student rule with 9 scales, and useful formulas and conversion data tables on the reverse side. Great for beginners and collectors alike.
These rules are in good condition, but do not have a case.
Scales include:
Front – A, B, CI, C, D, K, S, L, T
Back – Formulas and data table
Stock: 2
USD $129
12″/10″ Full Size System Rietz Mannheim Slide Rule.
Nestler’s most famous Mannheim rule, the same kind used by Werner von Braun and Albert Einstein. This rule has a mahogany core, with white celluloid faces, black, and red filled and engraved scales. Has the Rietz over-range scale extensions. This is a later production rule (R/3 revision), and in excellent condition over-all. Scales are unmarked. Glass 3 line cursor.
This simplex rule has cm side rulers 1:1 and 1:25, (great to leave parked on your desk!), all standard front/rear scales, inner body ruler extension, and conversion tables on the rear. Enjoyable to use, and very lovely to look at. One of the most classic and attractive German designs.
(10 Scales and 2 rulers)
Front – K, A, [ B, CI, C, ] D, L
Back – S, S+T, T plus Conversions.
Side – cm 1:1 and 1:25 cm rulers.
Stock: 1
USD $165
12.5″/10″ Full Size Slide Rule, cream white Ivorite construction with black engraved scales. This is essentially a late version of the 4053 made all of Ivorite like the 4150 series pocket rules, with folded scales, and decimal trig scales related to the C and D scales.
The rule has side rulers in both cm and inches, the back has conversion factors. The rule and cursor are in new/mint condition, but does not include a case. A very interesting rule that marked the serious shift along with the 4181 to Ivorite body design for K+E.
(12 Scales, 2 rulers)
Front – (inch) K, DF, [ CF, L, CI, C, ] D, A (cm)
Back – factors [ T, ST, S, C, ]
Stock: 1
USD $35
An excellent beginner/student slide rule featuring useful reference data and formulas on the reverse side. Manufactured in Japan by Hemmi.
Great as a starter rule for your collection, or as a gift. Includes the original, two-part, plastic case.
(9 Scales)
FRONT – A, [B, CI, C] D, K
BACK – [S, L, T] Formulas and reference data
Stock: 1
USD $65
This is a brand new, still sealed in its factory plastic, beginner/student slide rule featuring useful reference data and formulas on the reverse side. It is a later production model, so while it has a bamboo laminated body, the body is primarily plastic. Manufactured in Japan by Hemmi for Teledyne Post.
Great as a starter rule for your collection, or as a gift. Does not include a case.
(10 Scales)
FRONT – A, [B, CI, C] D, K
BACK – [S, L, T] Formulas and reference data
Stock: 2
USD $45
This is a brand new, still sealed in its factory plastic, beginner/student slide rule. Bamboo laminated body, manufactured in Japan by Hemmi for Teledyne Post.
Great as a starter rule for your collection, or as a gift. Does not include a case.
(10 Scales)
FRONT – K, DF, CF, CI, C, D, A
BACK – [TI, L, SI]
Stock: 1
USD $165
10″ Sun/Hemmi Electronics and Communications Slide Rule Powerful, new full sized rule with leather case, engraved black/red scales, adjustable bamboo body, framed glass cursor. An uncommon and useful rule.
These rules are in good condition, with some discoloration, and come with a replacement Sphere Research padded nylon duplex case (features carrying ring on the reverse of the case).
(19 Scales)
FRONT – db, Neper, DF [ CF, CIF, CI, C, ] D, LL3, LL2, LL1
BACK – A, L, [ C, SI, TI ] D, Lambda, F
Stock: 2
USD $195
This is a new/mint condition rule, still in its original factory plastic. A specialist, electrical engineering rule that features log log scales, with hyperbolic sine and tangent scales, additional vector/radian engineering scales, and inverted sine/tangent scales. Has folded scales, extended/inverted trig scales, and 3 log log scales. A very nice high end bamboo duplex rule, with a very uncommon scale set.
This rule comes in its original factory plastic, and two-piece carton case (case is in moderate condition).
Scales include:
Front – Sh1, Sh2, Th, A, [ B, TI1, TI2, SI, C, ] D, DI, x, theta
Back – L, K, DF, [ CF, CIF, CI, C, ] D, LL3, LL2, LL1
Stock: 1
USD $65
This is an unusual 6-scale (A, B, C, D – second B, C scales on reverse of slide) wooden rule from 1917, marked for reading out mils and yards – most likely this is either a survey rule, or was used for artillery calculations. The “FA” is very likely is an abbreviation for “Field Artillery.”
As rules go, given its age and production year, this rule is an actual piece of history.
Stock: 1
USD $75
This is an extremely advanced plastic body rule, from a lesser known Japanese manufacturer. It features a green contrast slide for easier reading, as well as black and red marked scales. Both sides of the rule feature padded feet, making the rule suitable for desktop use.
Comes in its original box, and two-part cardboard case.
(24 scales)
Front – LL-1, LL-2, LL-3, DF, [CF, CIF, CI, C], D, LL3, LL2, LL1
Back – L, K, A, [B, ST, T1, S, C], D, DI, LL0, LL-0
Stock: 1
USD $125
Hemmi 251 Bamboo Full Size Slide Rule in new / mint condition, including the original leather case and English instruction manual. Rule comes in its original factory plastic wrap. Made in Japan.
(19 scales)
Front – L, DF, CF, CIF, CI, C, D, LL3, LL2, LL1
Back – K, A, B, T, S, ST, C, D, DI
Stock: 1
USD $49
This unusual Aristo rule is used for calculating thermal radiation based on the absolute temperature of a black body and its total radiation. Includes the original instructions (in German).
Stock: 1
USD $195
10″ Sun/Hemmi Electronics and Communications Slide Rule Powerful, new full sized rule with leather case, engraved black/red scales, adjustable bamboo body, framed glass cursor. An uncommon and useful rule.
This is a later example of the rule that comes in the two part, plastic, case.
(19 Scales)
FRONT – db, Neper, DF [ CF, CIF, CI, C, ] D, LL3, LL2, LL1
BACK – A, L, [ C, SI, TI ] D, Lambda, F
Stock: 1
USD $195
10″ Sun/Hemmi Electronics and Communications Slide Rule Powerful, new full sized rule with leather case, engraved black/red scales, adjustable bamboo body, framed glass cursor. An uncommon and useful rule.
(19 Scales)
FRONT – db, Neper, DF [ CF, CIF, CI, C, ] D, LL3, LL2, LL1
BACK – A, L, [ C, SI, TI ] D, Lambda, F
Stock: 1
USD $165
12.5″/10″ Special Purpose Full Size Slide Rule
This special late production Foxboro flow rule is used to calculate flow parameters and rates for liquids, steam or gas. This is the version custom made for Foxboro by Hemmi of Japan, and has black engraved and filled scales, with color coded pipe schedules for easy operation.
The reverse side of the rule features detailed usage instructions. This example is in fair condition, with wear on the case and rule.
Stock: 1
USD $225
12.5″/10″ Special Purpose Full Size Slide Rule
This special late production Foxboro flow rule is used to calculate flow parameters and rates for liquids, steam or gas. This is the version custom made for Foxboro by Hemmi of Japan, and has black engraved and filled scales, with color coded pipe schedules for easy operation.
The reverse side of the rule features detailed usage instructions.
Stock: 1
USD $35
This is an introductory student rule with 9 scales, and useful formulas and conversion data tables on the reverse side. Great for beginners and collectors alike.
These specific rules come in the older style cardboard case. Both cases and rules show signs of wear, but scales, slides, cursors, and markings are in good condition.
Scales include:
Front – A, B, CI, C, D, K, S, L, T
Back – Formulas and data table
Stock: 12
USD $33
12″ / 10″ Simplex Slide Rule
This is something of a franken-rule, featuring the body from a Pickett 120-T, and the slide from a Pickett 120-ES, giving the rule improved readability. Embossed plastic construction, with black scales. A good student or starter rule, includes the original fibreboard case.
(9 Scales)
Front – K, A, [ B, S, T, CI, C ] D, L
Stock: 1
USD $215
12.5″/10″ Full Size Slide Rule
Log Log Duplex Decitrig rule, very late Ivorite body version, excellent example, near mint condition. Late production version of the famous 4081-3, excellent new improved cursor and metalwork. An outstanding and powerful rule, and great addition to any K+E collection. Used rule in excellent condition, includes a replacement Sphere Research Duplex Case.
(21 Scales)
Front – LL02, LL03, DF, [ CF, CIF, CI, C, ] D, LL3, LL2
Back – LL01, L, K, A, [ B, T, SRT, S, ] D, DI, LL1
Stock: 1
USD $195
10″ Log Log Duplex Decitrig Slide Rule, one of K+E’s premiere duplex rules, in the final wood body format, with inlaid wood edges and improved unbreakable cursor. This is another confusing K+E catalog numbering issue, the 68-1220 meant the 68-1210 rule in the green case, but the rule itself is unchanged at 68-1210, and is really the re-named 4081-3. Used rule in excellent condition, comes with a replacement Sphere Research Duplex Case.
(21 Scales)
Front – LL02, LL03, DF, [ CF, CIF, CI, C, ] D, LL3, LL2
Back – LL01, L, K, A [ B, T, SRT, S, ] D, DI, LL1
Stock: 1
USD $44
12″/10″ Scholar Slide Rule
NEW factory boxed sets, with black leatherette case. This rule is a step up from the 120 model, featuring additional scales and conversion factors on the back of the rule. Perfect for students. Rules are in new/mint condition, boxes show signs of wear.
(12 Scales)
Front – K, A, [ B, CI, C, ] D, L
Back – [ S, ST, T, C ] D
Stock: 4
USD $39
12″ / 10″ Simplex Slide Rule
New in its original box, and includes black leatherette case, and instructions. Embossed white plastic construction, with black scales. A good student or starter rule.
(9 Scales)
Front – K, A, [ B, S, T, CI, C ] D, L
Stock: 1
USD $49
12″/10″ Scholar Slide Rule
NEW factory boxed sets, with 2 part plastic case, 100 Year Anniversary boxes, and even the inspection slip inside. The rule has a 4 line slightly magnifying cursor, plus two color (red/black) scale markings and scales are self-documenting on the right hand side. A very functional and attractive trig rule set, with a bonus top edge cm ruler. The back is blank, but the slide reverse has S, ST and T trig scales.. Includes box, 2-part case, and basic English reprint, because manuals were not included.
(10 Scales + cm Ruler)
Front – cm/ A, [ B, CI, C, ] D, L, K
Back – [ S, ST, T ]
Stock: 6
USD $185
10″ Log Log Duplex Decitrig Slide Rule one of K+E’s premiere duplex rules, in the inlaid wood edge format. This rule comes with a new nylon Sphere Research.
(21 Scales)
Front – LL02, LL03, DF, [ CF, CIF, CI, C, ] D, LL3, LL2
Back – LL01, L, K, A [ B, T, SRT, S, ] D, DI, LL1
Stock: 1
USD $33
2″ / 10″ Simplex Slide Rule
Comes with original black leatherette case. Embossed white plastic construction (“T” for traditional body), black scales. A good student or starter rule. These rules are in near new condition.
(9 Scales)
Front – K, A, [ B, S, T, CI, C ] D, L
Stock: 8
USD $33
12″ / 10″ Simplex Slide Rule
In good condition with minor marking, comes with original leatherette case. Embossed yellow (ES eye-saver) plastic construction, black scales. A very useful student rule.
(9 Scales)
Front – K, A, [ B, S, T, CI, C ] D, L
Stock: 2
USD $33
12″ / 10″ Simplex Slide Rule
Comes with original brown leatherette case. Embossed white plastic construction, black scales, and grey plastic end braces. A good student or starter rule. This is a slightly slimmer version of the Microline 120 rule.
(9 Scales)
Front – K, A, [ B, T, S, CI, C ] D, L
Stock: 1
USD $44
12″ / 10″ Microline Simplex Trig Slide Rule w/Conversion Data
New bagged sets, with leatherette case, and factory instruction sheet. Embossed white plastic construction, black scales. A very useful student rule with conversion factors on the reverse side. These were shrink-wrapped hanging cards, some of these have been re-bagged due to failure in the original blisterpack plastic.
(9 Scales)
Front – K, A, [ B, S, T, CI, C ] D, L
Back – Conversion Factors
Stock: 5
USD $39
12″ / 10″ Simplex Slide Rule
Comes with original instruction sheet and leatherette case in a blister pack. Embossed white plastic construction, black scales. A very useful student rule, and an ideal first slide rule gift! These are MINT condition, perfect. You can give this to very young kids, as it can be easily washed in a sink with a bit of dish detergent if it gets covered in PB+J.
(9 Scales)
Front – K, A, [ B, S, T, CI, C ] D, L
Stock: 2
USD $175
12.5″/10″ Full Size Slide Rule complete with original embossed green slip case. Cream white Ivorite construction with black engraved scales. This is essentially a late version of the 4053 made all of Ivorite like the 4150 series pocket rules, with folded scales, and decimal trig scales related to the C and D scales.
The rule has side rulers in both cm and inches, the back has conversion factors. The rule and cursor are in excellent condition, the case is in good condition, with some folding creases at the top flaps. A very interesting rule that marked the serious shift along with the 4181 to Ivorite body design for K+E.
(12 Scales, 2 rulers)
Front – (inch) K, DF, [ CF, L, CI, C, ] D, A (cm)
Back – factors [ T, ST, S, C, ]
Stock: 1
USD $159
12″ / 10″ Electronic Duplex Slide Rule
New / mint condition rule with maroon leather case, gold embossed with Cleveland Institute of Electronics and Pickett logo. Traditional (T) white coated aluminum construction, black and red scales, optimized for electronics problems. Includes belt loop strap, and manual reprint.
This is an extremely useful rule, made in the trademark aluminum body format by Pickett. Fortunately, all the special scales are SELF-DOCUMENTING on the right hand side, unusual for Pickett!
(15 Scales)
Front – H, 2pi, A, [ B, S, T, CI, C ] D, L, Ln
Back – Reactance/Resonance Decimal Point locator scales formulas and factors
Stock: 23
USD $149
12″ / 10″ Electronic Duplex Slide Rule
New / mint condition rule with maroon leather case, gold embossed with Cleveland Institute of Electronics and Pickett logo. Traditional (T) white coated aluminum construction, black and red scales, optimized for electronics problems.
This is an extremely useful rule, made in the trademark aluminum body format by Pickett. Fortunately, all the special scales are SELF-DOCUMENTING on the right hand side, unusual for Pickett!
(15 Scales)
Front – H, 2pi, A, [ B, S, T, CI, C ] D, L, Ln
Back – Reactance/Resonance Decimal Point locator scales formulas and factors
Stock: 1
USD $80
12″/10″ Full Size Simplex Math Slide Rule
This rule exists in two formats, and later ones came without the special rear scales, and just a trig manual. An excellent student rule with the unusual ability to ADD and SUBTRACT, and do 20 decade calculations.
(10 Scales)
Front – A, [ B, CI, C, ] D, L
Back – X, [ Y, C* ] D*
Stock: 1
USD $86
12″/10″ Full Size Simplex Math Slide Rule
This rule exists in two formats, and later ones came without the special rear scales, and just a trig manual. An excellent student rule with the unusual ability to ADD and SUBTRACT, and do 20 decade calculations.
(10 Scales)
Front – A, [ B, CI, C, ] D, L
Back – X, [ Y, C* ] D*
Stock: 1
USD $95
12″/10″ Full Size Simplex Math Slide Rule, Boxed Set complete with box, case, manual, and warranty card!
ES (Eye-Saver) Yellow aluminum construction. Very high quality, American Made, Pickett rule. This rule exists in two formats, and later ones came without the special rear scales, and just a trig manual. An excellent student rule with the unusual ability to ADD and SUBTRACT, and do 20 decade calculations. Boxes have carton creases, storage scuffs, tears and marks. Can ADD, SUBTRACT and do 20 decade Multiplication/Division
(10 Scales)
Front – A, [ B, CI, C, ] D, L
Back – X, [ Y, C* ] D*
Stock: 3
USD $49
12″/10″ Full Size Slide Rule in updated body format
K+E’s stylish green and white student rule styled to look like a high-end K+E Deci-lon. Engraved scales for ruggedness, and includes vinyl slip case and English factory manual.
These are excellent condition, complete with everything, we pull all of them from the slip cases and clean any release agent off the rule (from the vinyl case). The back of the rule is blank. All have original manuals. The plastic sleeve has the name of the South American distributor stamped on these. These rules have some age discoloration.
(9 Scales)
Front – K, A, [ B, S, CI, T, C ] D, L
Stock: 5
USD $55
12″/10″ Full Size Slide Rule in updated body format
K+E’s stylish green and white student rule styled to look like a high-end K+E Deci-lon. Engraved scales for ruggedness, and includes vinyl slip case and english factory manual.
These are excellent condition, complete with everything, we pull all of them from the slip cases and clean any release agent off the rule (from the vinyl case). The back of the rule is blank. All have original manuals. The plastic sleeve has the name of the South American distributor stamped on these.
(9 Scales)
Front – K, A, [ B, S, CI, T, C ] D, L
Stock: 18
USD $149
12″ / 10″ Hi Log Log Duplex Slide Rule
Eye-saver yellow (ES) coated aluminum construction, black and red scales. This is a very sophisticated Log Log rule, made in the trademark aluminum body format by Pickett. Comes with original Pickett box, embossed brown leather case, and manual.
(22 Scales)
Front – LL2+0.1, LL2-0.1, DF [ CF, CIF, L, CI, C ] D, LL3+1.0, LL3-1.0
Back – LL1+0.01, LL1-0.01, A, [ B, T, ST, S, C ] D, DI, K
Stock: 1
USD $129
12″ / 10″ Power Trig Slide Rule
Very nice trig rule with black and red (inverse) scales, on the white (Traditional) body. This has the split square root scales, S, T and ST, plus DI scale for more calculating power and precision. Includes black textured leather case with gold embossed Pickett logo, manual, and original box w/warranty card. NIB, mint condition.
(17 Scales)
Front – K, A, [ B, ST, T, S, C ], D, DI
Back – L, DF, [ CF, CIF, CI, C ], D, DI
Stock: 2
USD $115
12″ / 10″ Capitol Radio Engineering Institute Log-Log Slide Rule
Very nice engineering rule with black and red (inverse) scales, on the yellow (Eye Saver) body, made for CREI. Comes in its original box, and includes brown textured leatherette case, manual, and original box w/warranty card. NIB, mint condition.
(16 Scales)
Front – K, A, [ B, CI, C ], D, L, Ln
Back – LL2, LL1, [ S, ST, T, C], D, LL3
Stock: 1
USD $44
2″ / 10″ Microline Simplex Trig Slide Rule w/Conversion Data
In its original “5 Moon Landings” box, and leatherette case. Embossed white plastic construction, black scales. A very useful student rule with conversion factors on the reverse side.
(9 Scales)
Front – K, A, [ B, S, T, CI, C ] D, L
Back – Conversion Factors
Stock: 1
USD $129
12″ / 10″ Power Trig Slide Rule
Very nice trig rule with black and red (inverse) scales, on the green(Eye Saver, very rare) body. This has the split square root scales, S, T and ST, plus DI scale for more calculating power and precision. Includes black textured leather case with gold embossed Pickett logo, manual, and original box w/warranty card. NIB, mint condition.
(17 Scales)
Front – K, A, [ B, ST, T, S, C ], D, DI
Back – L, DF, [ CF, CIF, CI, C ], D, DI
Stock: 1
USD $95
12″ / 10″ Power Trig Slide Rule
Very nice trig rule with black and red (inverse) scales, on the green(Eye Saver, very rare) body. This has the split square root scales, S, T and ST, plus DI scale for more calculating power and precision. Includes black textured leather case with gold embossed Pickett logo, manual, and original box. Case, manual, and box have signs of wear and are in fair condition, rule is good condition.
(17 Scales)
Front – K, A, [ B, ST, T, S, C ], D, DI
Back – L, DF, [ CF, CIF, CI, C ], D, DI
Stock: 1
USD $129
12″ / 10″ Power Trig Slide Rule
Very nice trig rule with black and red (inverse) scales, on the yellow (Eye Saver) body. This has the split square root scales, S, T and ST, plus DI scale for more calculating power and precision. Includes black textured leather case with gold embossed Pickett logo, manual, and original box w/warranty certificate.
(17 Scales)
Front – K, A, [ B, ST, T, S, C ], D, DI
Back – L, DF, [ CF, CIF, CI, C ], D, DI
Stock: 5
USD $165
10″ Polyphase Duplex Decitrig Slide Rule, one of K+E’s less common duplex rules, with a narrower body than the 4081. Has slanted/red and blue colored directional trig scale markings, and a very good glass cursor. Both rule and case are in excellent condition.
(15 Scales)
Front – DF, [ CF, CIF, CI, C, ] D, L
Back – K, A [ B, T, ST, S, ] D, DI
Stock: 1
USD $185
10″ Polyphase Duplex Slide Rule, in the inlaid wood edge format. This rule is in excellent condition, and the case is in good condition with some minor wear.
(13 Scales)
Front – DF, [CF, CIF, C], D
Back – K, A, [B, S, T, CI], D, L
Stock: 1
USD $75
A beginner Manheim/simplex rule, full plastic body and cursor. Includes a plastic slip case.
(9 scales)
Front – S, K, A, [B, CI, C], D, L, T
Back – Blank
Stock: 3
USD $135
10″ Full Size Mannheim Slide Rule.
K&E’s most popular Mannheim rule, this is an excellent example of the 4053-3 rule. This simplex rule has both inch and cm side rulers (great to leave parked on your desk!), all standard front/rear scales, plus conversion factors on the rear.
This rule comes with its original black leather case, with K+E logo embossing.
(9 Scales, 2 Rulers)
Front – A, [ B, CI, C, ] D, K
Back – S, L, T plus Conversions.
Stock: 2
USD $65
An excellent student and beginner simplex/Manheim rule, featuring Aristo’s yellow contrast scales, and and black and red scale markings. Comes with case, rule, and manual. Rules are in new condition.
(8 Scales, 4 cursor lines)
Front – DF, [CF, CIF, CI, C], D, A, K
Back – Blank
Stock: 6
USD $85
A later model Castell rule produced for Feinmessinstitut Klawun, Hannover. Features yellow contrast scales, and red/black scale markings. A good engineer and student rule, at home working on the desktop. Includes plastic case, rule is in fair condition with some discoloration and fading.
(10 Scales, 5 cursor lines)
Front – K, A, [B, CI, C], D, L, Ruler (cm)
Back – [S, ST, T]
Stock: 1
USD $79
A slightly more advanced beginner rule with more scales and cursor marking (featuring Aristo’s yellow contrast scales, and red/black scale markings), despite being a simplex/Manheim rule this is still a very capable rule. Includes the original case, signs of wear on some of the scales, age discoloration.
(13 Scales, 4 cursor lines)
Front – L, K, A, [B, CI, C], D, S, ST, T
Back – [ S, LL2, LL3], rulers
Stock: 3
USD $165
12.5″/10″ Full Size Slide Rule
This is the early log log rule from K+E, which still has trig functions in degrees, minutes and seconds (useful for map navigation). Features the newer, metal framed cursor, which indicates the production period of this rule was most likely in the late 1930s. Comes with the original fibreboard case, which is heavily damaged. Rule is in good condition.
(17 Scales)
Front – K, DF, [ CF, CIF, CI, C] D, L
Back – LL0, A, [ B, S, T, C, ] LL3, LL2, LL1
Stock: 1
USD $165
A classic mahogany body rule from K&E in very good condition, featuring scale adjustment clamp screws on the reverse side of the rule for adjusting the friction of the slide.
(7 Scales)
Front – A, [ B, C], D
Back – [ S, L, T], Conversions
Stock: 1
USD $55
A well aged, early model rule from the K&E collection of mahogany bodies wood rules. A beautiful and simple rule for beginners, or for someone looking to round out their collection. Comes with the original fibreboard case.
(7 Scales)
Front – A, [ B, C], D
Back – [ S, L, T], Conversions
Stock: 1
USD $69
An unusual Post rule that was made entirely in the US, and not a Hemmi produced rule with a Post marking. Wood body rule, with black and red scale marking, all plastic cursor.
(18 Scales)
Front – T, DF, [CF, CIF, CI, C], D, S, T
Back – LL0, LL00, A, [B, K, L, C], LL3, LL2, LL1
Stock: 1
USD $89
A slightly more advanced beginner rule with more scales and cursor marking (featuring Aristo’s yellow contrast scales, and red/black scale markings), despite being a simplex/Manheim rule this is still a very capable rule. Includes the original factory box in good condition, case, and manual. New in box rule.
(13 Scales, 4 cursor lines)
Front – L, K, A, [B, CI, C], D, S, ST, T
Back – [ S, LL2, LL3]
Stock: 2
USD $75
An excellent student and beginner simplex/Manheim rule, featuring Aristo’s yellow contrast scales, and and black and red scale markings. Comes in the original factory box still in excellent condition, case, rule, manual, and warranty card. new in box rule.
(8 Scales, 4 cursor lines)
Front – DF, [CF, CIF, CI, C], D, A, K
Back – Blank
Stock: 1
USD $75
The Acumath 500 is a budget friendly, but still fairly capable rule, designed for students and those learning to use a slide rule. White plastic body with metal end braces, and the original plastic carry case.
(9 Scales)
Front – S, K, A, [B, CI, C] D, L, T
Back – Conversion factors
Stock: 1
USD $225
10″ Log Log Duplex Decitrig Slide Rule, one of K+E’s premiere duplex rules, in the final wood body format, with inlaid wood edges and improved unbreakable cursor. This is another confusing K+E catalog numbering issue, the 68-1220 meant the 68-1210 rule in the green case, but the rule itself is unchanged at 68-1210, and is really the re-named 4081-3. Great metal work, cursor and lenses, beautiful condition set for somebody looking for this high end rule.
(21 Scales)
Front – LL02, LL03, DF, [ CF, CIF, CI, C, ] D, LL3, LL2
Back – LL01, L, K, A [ B, T, SRT, S, ] D, DI, LL1
Stock: 1
USD $175
12″/10″ Full Size Mannheim Slide Rule.
K&E’s most popular Mannheim rule, this 4053-3 rule includes a very rare clip-on cursor magnifier, with the mahogany back, glass cursor, and 2 side rulers. This simplex rule has both inch and cm side rulers (great to leave parked on your desk!), all standard front/rear scales, plus conversion tables on the rear. Enjoyable to use, and lovely to look at.
This rule set comes with an excellent sewn leather case, with K+E logo embossing, built to accommodate the magnifying cursor lens.
(9 Scales, 2 Rulers)
Front – A, [ B, CI, C, ] D, K
Back – S, L, T plus Conversions.
Stock: 1
USD $125
This is a later production run of this rule, featuring the full Ivorite body. A simplex/Manheim rule that is great for students and simpler desk work, featuring metric and imperial rulers on the upper and lower edges. Black and red engraved and filled scales. Both the rule and case are in mint/new condition.
(5 Scales, 2 rulers)
Front – DF, [ CF, CI, C], D
Back – Blank, Conversion factors
Stock: 1
USD $195
10″ Log Log Duplex Decitrig Slide Rule one of K+E’s premiere duplex rules, in the inlaid wood edge format. This rule comes with a black leather case, original manual, and original box. The box is heavily worn, and there is some light marking on the leather case.
(21 Scales)
Front – LL02, LL03, DF, [ CF, CIF, CI, C, ] D, LL3, LL2
Back – LL01, L, K, A [ B, T, SRT, S, ] D, DI, LL1
Stock: 1
USD $225
10″ Polyphase Duplex Decitrig Slide Rule one of K+E’s less common duplex rules, with a narrower body than the 4081. Has slanted/red and blue colored directional trig scale markings, and a very good glass cursor.
Both the rule and case are in new condition, the original box is heavily worn.
(15 Scales)
Front – DF, [ CF, CIF, CI, C, ] D, L
Back – K, A [ B, T, ST, S, ] D, DI
Stock: 1
USD $159
10″ Full Size Mannheim Slide Rule.
K&E’s most popular Mannheim rule, this is a late production set of the famous 4053-3 rule, released under model number 68-1622. This simplex rule has both inch and cm side rulers (great to leave parked on your desk!), all standard front/rear scales, plus conversion factors on the rear.
This rule set comes with an excellent sewn leather case, with K+E logo embossing, a full factory soft-cover manual, care booklet, and a worn original green K+E storage box.
(9 Scales, 2 Rulers)
Front – A, [ B, CI, C, ] D, K
Back – S, L, T plus Conversions.
Stock: 4
USD $185
10″ Polyphase Duplex Slide Rule, in the inlaid wood edge format. This rule comes with its original box, and leather case.
(13 Scales)
Front – DF, [CF, CIF, C], D
Back – K, A, [B, S, T, CI], D, L
Stock: 1
USD $175
13″/10.5″ Duplex Log Log Slide Rule
Some scale bleeding and fading on the rule. Features black and red scale indications, and green contrast scale on the reverse side. Includes accessory ruler, original manual (in English), and display case.
(22 scales, 2 rulers)
Front – cm, T1, T2, A, [ B, BI, CI, C, ] D, P, S, inches
Back – LL03, LL02, LL01, K [ K’, L, ST, CF] DF, LL1, LL2, LL3
Stock: 2
USD $275
13″/10.5″ Duplex Log Log Slide Rule – Mint Condition, includes support rule and original manual.
One of the nicer plastic body rules ever made, with anodized adjustable aluminum end braces, duplex 5/3-line cursor, two color (red/black) scale markings, and trademark mint green stripe on primary scales (both sides). This rule also has 6 log log scales, and paired K scales for 3 decade operations. Body is fully alignable at the aluminum end-pieces.
Rule is self documenting on right hand side for all scales. Has Pythagorean scale (P), BI scale, dual Tangent scales (T1/T2), folded scales and scale over-ranges.
(24 scales, 8 cursor lines)
Front – L, T1, T2, A, [ B, BI, CI, C, ] D, ST, S, P
Back – LL03, LL02, LL01, K [ K’, C, CIF, CF, ] DF, LL1, LL2, LL3
Stock: 1
USD $175
10″ Log Log Duplex Decitrig Slide Rule one of K+E’s premiere duplex rules, in the inlaid wood edge format. This rule comes with the green colored, fibre board case.
(21 Scales)
Front – LL02, LL03, DF, [ CF, CIF, CI, C, ] D, LL3, LL2
Back – LL01, L, K, A [ B, T, SRT, S, ] D, DI, LL1
Stock: 1
USD $95
Full size rule with an older, fibre board case that has the model embossed on the top of the flap. Rule is in very good condition for its age.
(14 Scales)
Front – K, A, B, T, ST, S, D, DI
Back – DF, CIF, CI, C, D, L
Stock: 1
USD $24
12″ / 10″ plastic body Slide Rule
LATE MODEL, made by Sterling (later Borden which bought out both Acumath and Sterling Plastics, and continued to sell under those names). Includes instructions, black engraved and filled scales, and yellow contrasting color slide. Can do 16 metric conversions from US standards to Metric units and vice versa. Front slide for distance and area, reversible slide for weight and volume conversions. An inexpensive and practical rule for any science students, cooks, or anyone needing to work in both unit systems. Made in USA. These rules come new, still sealed in their original packaging.
(16 Conversions)
Front – [ Inches/cm, m/feet, m/yards, miles/km, sq. in./sq. cm, sq.m/sq. ft x10, sq. m/sq yards, sq. miles/sq. km ]
Back – [ cu. in./cu cm x10, cu m/cu.ft.x10, cu. m/cu. yards, l/qt., oz./g x10, kg/lbs, metric tons/short tons, gal./l]
Stock: 3
USD $69
12″/10″ Full Size Mannheim Slide Rule.
One of K&E’s most popular Mannheim rule, with the mahogany back, glass cursor, and 2 side rulers. This simplex rule has both inch and cm side rulers (great to leave parked on your desk!), all standard front/rear scales, plus conversion tables on the rear. Enjoyable to use, and lovely to look at. Includes the factory original leather case, some discoloration on the face of the rule (common for rules of this age).
(9 Scales, 2 Rulers)
Front – inch / A, [ B, CI, C, ] D, K
Back – S, L, T plus Conversions.
Stock: 1
USD $95
12″ / 10″ Electronic Duplex Slide Rule
New and in the original factory plastic, the this 531 is an all aluminum rule in Pickett’s Eye Saver (ES) yellow, featuring black scales. This specific rule was made for the Capitol Radio Engineering Institute.
(17 Scales)
Front – L, Ln, A, [B, CI, C], D, 2π, K
Back – LL2, LL1, [S, ST, T, C], D, LL3
Stock: 1
USD $195
12″/10″ Full Size Aristo HyperboLog Slide Rule.
This rule has an engineering plastic body, with filled and engraved black and red scales, with yellow accent stripes (a bit faded) on reference scales, plus scales are self-documenting on right hand side. Has the Rietz over-range scale extensions, plus anti-skid bottom bumpers, and 5 line cursor. Includes Log Log, folded and DI scales. out rule.
Includes two part plastic case that has been enclosed with some form of protective cover, and original support gudte.
(25 scales!, 5 cursor lines)
Front – LL01, LL02, LL03, DF, [CF, CIF, L, CI, C], D, LL3, LL2, LL1
Back – Th, K, A, [B, T, ST, S, C], D, DI, Sh2, Sh1
Stock: 1
USD $189
12″/10″ 944-28 Duplex Slide Rule
This rule is in excellent condition, although the factory case has some marking and wear. The 944-20 features the trademark S/M blue slide and body braces, multi-line cursor, plus two color (red/black) scale markings, and folded scales. The rule is self documenting on the right hand side for all scales. This an advanced rule for engineers, mathematicians, and demon slayers (if you know, you know…).
(24 Scales, 6 Cursor Lines)
Front – LL-1, LL-2, LL-3, DF, [CF, CIF, CI, C], D, LL3, LL2, LL1
Back – L, K, A, [B, ST, T, S, C], D, DI, LL0, LL-0
Stock: 1
USD $15
A classic K&E beginner’s slide rule, wood body construction, with four scales, and common references on the reverse side.
(4 Scales)
Front – A, B, C, D
Back – Reference data and formulas
Stock: 1
USD $169
12″/10″ 544 LL Simplex Slide Rule
NIB, A visually beautiful rule, complete with 2 part plastic case, manual, and factory box. The 544LL features the trademark S/M blue slide and body braces, multi-line (4 line) cursor, plus two color (red/black) scale markings, and folded scales. The rule is self documenting on the right hand side for all scales. The ‘invisible brace’ style with braces on the back gives the rule a very clean European look from the front. Blank on the reverse side, with two rulers.
(14 Scales, 4 Cursor Lines)
Front – L, K, A, [B, CI, C], D, S, ST, T
Back – [S, LL1, LL2, LL3], Rulers – metric and imperial
Stock: 1
USD $125
12″/10″ 54401 Simplex Rule
This is a used rule with an extensively worn case, and some staining on the rule. This rule features a very rare P-scale, an imperial ruler on the upper rule edge, and is designed with engineers in mind. It features four cursor lines for energy and power conversions, and multiple technical references on the reverse side.
(8 Scales, 4 Cursor Lines, 1 Ruler – inches)
Front – L, K, A, [B, CI, C], D, P, S, T
Back – LL1, LL2, LL3, Formula references, common conversion factors, weight and metal references
Stock: 1
USD $169
12″/10″ Full Size Aristo Multilog Slide Rule.
One of Aristo’s high end professional rules, very popular in Europe. This rule has an engineering plastic body, with filled and engraved black and red scales, yellow accent stripes on reference scales, plus scales are self-documenting on right hand side. Has the Rietz over-range scale extensions, plus anti-skid bottom bumpers, and 6 line cursor. Includes Log Log, folded and DI scales. Comes with
Set includes the rule, original leather case (some warping and drying in the leather), and instruction manual.
(24 Scales)
Front – LL00, K, A, [ B, T, ST, S, C, ] D, DI, LL0
Back – LL01, LL02, LL03, DF,[ CF, CIF, L, CI, C, ] D, LL3, LL2, LL1
Stock: 2
USD $425
Boxed Set 12″/10″ Deci-lon Slide Rule
Ivorite, Log Log Duplex Decitrig rule, metal framed unbreakable cursor. White “Ivorite” construction, with engraved black and red scales that include directional tilt for inverse trig scales. Complete with original K&E gold embossed orange leather case, display box, belt loop, hardbound book and care booklet.
The Deci-lon has extra dual square/root scales, and range data for log and trig scales on the face. The actual set is pictured, excellent condition.
(26 Scales !!)
Front – Sq1, Sq2, DF, [ CF, CIF, L, CI, C, ] D, Ln0, Ln1, Ln2, Ln3
Back – Ln-3, Ln-2, Ln-1, Ln-0, A, [ B, T, SRT, S, C,] D, DI, K
Stock: 1
USD $135
This is a NIB Ricoh 116, featuring a transparent plastic case and original manual. Factory box is missing a flap and has signs of wear. This is an excellent student rule or engineering rule that features a metric ruler along the upper edge and a variety of formula and technical references on the reverse.
(24 Scales)
Front: K, DF, CF, CIF, CI, C, D, A, DI [T1, T2, L, S]
Back: Metric and imperial conversions, reference formulae, scale references, metal weights
Stock: 1
USD $189
12″ / 10″ Electronic Duplex Slide Rule
In excellent condition with suede case. Eye Saver yellow (ES) coated aluminum construction, black and red scales, optimized for electronics problems, with dual marking on the front, and Chan Street special multi-decade electronics scales on the rear (Like the N16!).
This is an extremely useful rule, made in the trademark aluminum body format by Pickett.
(16 Multi-function Scales)
Front – L, Ln, Cr/AI, [ Lr/B, ST, T, C/L/I/C, ] F/X/E/R/W/D, Xc/DI, K
Back – Reactance/Resonance Decimal Point locator scales formulas and factors
Stock: 1
USD $75
12″/10″ Full Size Simplex Math Slide Rule
This rule exists in two formats, and later ones came without the special rear scales, and just a trig manual. An excellent student rule with the unusual ability to ADD and SUBTRACT, and do 20 decade calculations.
(10 Scales)
Front – A, [ B, CI, C, ] D, L
Back – X, [ Y, C* ] D*
Stock: 1
USD $69
Pickett’s Best Self-Teaching Rule!
12″/10″ Full Size Simplex Trig Slide Rule, T (traditional) white construction. Very high quality, American Made, Pickett rule – a great instructional rule that never loses its manual (it’s imprinted on the back surface!) at a great price. An excellent student rule with good trig capability.
Front – K, A, [ B, T, S, CI, C, ] D, L
Back – instructions, fractional/decimal equivalents
Stock: 1
USD $235
13″/10.5″ Duplex Log Log Slide Rule – Excellent Condition, includes original German manual and support rule.
One of the nicer plastic body rules ever made, with anodized adjustable aluminum end braces, duplex 5/3-line cursor, two color (red/black) scale markings, and trademark mint green stripe on primary scales (both sides). This rule also has 6 log log scales, and paired K scales for 3 decade operations. Body is fully alignable at the aluminum end-pieces.
Rule is self documenting on right hand side for all scales. Has Pythagorean scale (P), BI scale, dual Tangent scales (T1/T2), folded scales and scale over-ranges.
(24 scales, 8 cursor lines)
Front – L, T1, T2, A, [ B, BI, CI, C, ] D, ST, S, P
Back – LL03, LL02, LL01, K [ K’, C, CIF, CF, ] DF, LL1, LL2, LL3
Stock: 1
USD $265.
13″/10.5″ Duplex Log Log Slide Rule – Very Good Condition, some minor scale bleeding. Does not have original manual or support rule.
One of the nicer plastic body rules ever made, with anodized adjustable aluminum end braces, duplex 5/3-line cursor, two color (red/black) scale markings, and trademark mint green stripe on primary scales (both sides). This rule also has 6 log log scales, and paired K scales for 3 decade operations. Body is fully alignable at the aluminum end-pieces.
Rule is self documenting on right hand side for all scales. Has Pythagorean scale (P), BI scale, dual Tangent scales (T1/T2), folded scales and scale over-ranges.
(24 scales, 8 cursor lines)
Front – L, T1, T2, A, [ B, BI, CI, C, ] D, ST, S, P
Back – LL03, LL02, LL01, K [ K’, C, CIF, CF, ] DF, LL1, LL2, LL3
USD $75
A specialised, full size, all metal rule made by Pickett for Fisher Controls.
Front -ΔP Liquid Pressure Drop, %Q C2, P1 Inlet Pressure, Flow, Q, Liquid Cv, Gas or Vapor Cg
Back – PSI Drop, P1, Gas Specific Gravity, Temp, Superheat, Flow, F, Cg Gas, Cs Steam,
Stock: 1
USD $49
An entry level rule good for students, single sided with contrasting mint green slide. Rule is new and in original packaging, with user manual.
(9 Scales)
Front -K, S, A, B, CI, C, D, T, L
Back – Blank
Stock: 5
USD $195
13″/10.5″ Duplex Log Log Slide Rule
This is the late model of this rule which includes metric and imperial rulers on the upper and lower edges, but does not have the green contrast scales normally found on the FC rules. Includes accessory ruler, original manual (in German), and display case.
(22 scales, 2 rulers)
Front – cm, T1, T2, A, [ B, BI, CI, C, ] D, P, S, inches
Back – LL03, LL02, LL01, K [ K’, L, ST, CF] DF, LL1, LL2, LL3
Stock: 1
USD $139
12″ / 10″ Hi Log Log Duplex Slide Rule
Late model with black leather case. Traditional (T) white coated aluminum construction, black and red scales. This is a very sophisticated rule, made in the trademark aluminum body format by Pickett.
(22 Scales)
Front – LL2+0.1, LL2-0.1, DF [ CF, CIF, L, CI, C ] D, LL3+1.0, LL3-1.0
Back – LL1+0.01, LL1-0.01, A, [ B, T, ST, S, C ] D, DI, K
Stock: 2
USD $165
12.5″/10″ Full Size Slide Rule
complete with sewn leather case. This is the early log log rule from K+E, which still has trig functions in degrees, minutes and seconds (useful for map navigation).
The slide has serial number 604619, there is NO K+E logo, only the name. The rule is in very good condition, the case in good condition, but has numerous wear marks. A very nice set with old trig scales from long ago.
(17 Scales)
Front – K, DF, [ CF, CIF, CI, C, ] D, L
Back – LL0, A, [ B, S, T, C, ] LL3, LL2, LL1
Stock: 1
USD $495
Excellent condition, no visible scale bleeding, minimal/no marking or discoloration to display case.
Considered to be the most advanced slide rule produced: gold anodized adjustable aluminum end braces, duplex 5/4-line cursor, two color (red/black) scale markings, and trademark mint green stripe on primary scales (both sides), plus additional blue stripes on the A and B scales, and massive 2 1/4″ wide body. Expanded W square root scales, for both the square root of x and 10x, 8 log log scales, and raised rubber bumpers to prevent cursor scraping, and to give the rule grip on a desktop. Body is fully alignable at the aluminum end-pieces, and provides finger grip areas on the slide for better movement. Cursor pops off (note the recess on the side bars) for easy cleaning, while retaining its alignment, a very handy feature! Rule is self documenting on right hand side for all scales. Has Pythagorean scale (P), expanded square scales, folded scales and scale over-ranges. Includes: Original box, case, original manual in Spanish, reprint manual in English, and accessory rule.
Scales include:
Front – T1, T2, K, A, DF, [ CF, B, CIF, CI, C, ] D, DI, S, ST, P
Back – LL03, LL02, LL01, LL00, W2 [ W2′, CI, L, C, W1′, ] W1, LL0, LL1, LL2, LL3
Stock: 1
USD $265
This is a new and complete box set for the Versalog 341-3010 full size rule originally made by Sun / Hemmi. Rules are marked as being from Post, Hughes Owens, or GeoTec, but all bear the original Hemmi manufacturing mark. Boxes are heavily distressed.
Includes rule, case, and user manual. Rule in mint condition. Book in good condition; case has some scrapes.
(23 scales)
Front: LL/1, LL/2, LL/3, TT, SecT / ST, Cos / S, C, D, LL3, LL2, LL1
Back: LL0, LL/0, K, DF, CF, CIF, CI, C, D, R1, R2, L
Stock: 1
USD $265
10″, Engineering Versalog Slide Rule
We get only a few sets that are well cared for, these is in excellent condition. The rule and case are both free of marks, and ae clean and bright.
Laminated bamboo construction, self lubricating design.
Wears very well, and slides smoothly under all conditions. This is the classic high end slide rule from POST.
(23 Scales)
Front: L, LL/1 (e-0.01<-0.1), LL/2 (e-0.1<-1.0), LL/3 (e-1.0<-10), [ T, SRT, Cos/S, C, ] D, LL3 (e+1>10), LL2 (e+0.1>1.0), LL1 (e+.01>.1).
Back: LL/0 (e-.001<-.01), K, DF, [ CF, CIF, CI, C, ] D, R1, R2, LL0 (e+.001>.01)
Stock: 1
USD $69
11″/10″ Full Size Slide Rule
The best known bamboo Mannheim rule offered by POST, with reversible slide, formulas and conversions on reverse side. White laminate, Sun/Hemmi Japanese bamboo construction, engraved scales in blue and red. Sealed in original packaging, includes two part plastic case and instruction manual.
(9 Scales)
Front – A, [ B, CI, C, ] D, K
Back – Formulas and conversions,
reverse of slide is S, L, T
Stock: 2
USD $130
11″/10″ Full Size Slide Rule
The nicest Hemmi bamboo Mannheim rule offered by POST, with reversible slide, formulas and conversions on reverse side, side rulers in inches and cm. White laminate, Sun/Hemmi Japanese bamboo construction, engraved scales in blue and red. Rule condition is excellent, with only good condition cardboard box cases, all have marks, sticker residue or rubbed paint areas.
(9 Scales, 2 Rulers)
Front – inch / A, [ B, CI, C, ] D, K | cm
Back – Formulas and conversions, reverse of slide is S, L, T
Stock: 2
USD $275
13″/10.5″ Duplex Log Log Slide Rule
One of the nicer plastic body rules ever made, with anodized adjustable aluminum end braces, duplex 5/3-line cursor, two color (red/black) scale markings, and trademark mint green stripe on primary scales (both sides). This rule also has 6 log log scales, and paired K scales for 3 decade operations. Body is fully alignable at the aluminum end-pieces.
Rule is self documenting on right hand side for all scales. Has Pythagorean scale (P), BI scale, dual Tangent scales (T1/T2), folded scales and scale over-ranges.
(24 scales, 8 cursor lines)
Front – L, T1, T2, A, [ B, BI, CI, C, ] D, ST, S, P
Back – LL03, LL02, LL01, K [ K’, C, CIF, CF, ] DF, LL1, LL2, LL3
Stock: 1
USD $135
Exceptionally useful late version Ivorite body rule from K+E (68-1565), with mint gold-embossed, black sewn leather case and manual. This modern style rule has the unique inch/cm converter scales and rulers on the rear side. A very attractive and useful rule, with dual Sq scales, trig and folded scales, plus the metric conversion/rulers/log calculator on the rear face.
(16 Scales, 2 Rulers)
Front – Sq1, Sq2, DF, [ CF, T, SRT, S, CI, C, ] D, A, K
Back – number, [ cm, (factors and data) inch, ] Logarithm
Stock: 5
USD $159
Exceptionally useful late version Ivorite body rule from K+E (68-1565), with mint gold-embossed, black sewn leather case. This very late (1966 scale copyright) modern style rule has the unique inch/cm converter scales and rulers on the rear side. A very attractive and useful rule, with dual Sq scales, trig and folded scales, plus the metric conversion/rulers/log calculator on the rear face.
(16 Scales, 2 Rulers)
Front – Sq1, Sq2, DF, [ CF, T, SRT, S, CI, C, ] D, A, K
Back – number, [ cm, (factors and data) inch, ] Logarithm
Stock: 1
USD $115
Hemmi 251 Bamboo Full Size Slide Rule (new/mint)
(19 scales)
Front – L, DF, CF, CIF, CI, C, D, LL3, LL2, LL1
Back – K, A, B, T, S, ST, C, D, DI
Stock: 1
USD $125
Hemmi P253 Vectorlog Full Size Slide Rule w/Display Case and Manual
(18 scales)
Front – LL3, LL2, DF, CF, CIF, CI, C, D, K, LL1
Back – K, A, B, TI2, TI1, SI, D, DI
Stock: 1
USD $69
11 scale full-size rule, with original instruction manual. Some writing on reverse side of rule, but otherwise in excellent condition.
(11 scales)
Front – L, K, A, B, DI, CI, C, D, S, ST, T
Back – Blank
Stock: 3
USD $45
This 13-scale full size rule features large, color contrasted scale for easy reading, and operating instructions printed on the reverse side of the rule. Includes the original case, box, and operating instructions (in German).
Scales are as follows:
Front – A, DF, CF, CIF, CI, C, D, kW, k
Back – Z’, N’, Z, N, instructions
Stock: 1
Stock: 1
USD $245
Hemmi 260 Full Bamboo Size Rule (new/mint)
(25 Scales)
Front – LL/1, LL/2, LL/3, DF, CF, CIF, CI, C, D, LL3, LL2, LL1
Back – LL/O, LL0, K, A, B, T, S, ST, C, D, DI, P, L
Stock: 1
USD $225
This is an extremely rare, early model K&E rule in it’s original box, complete with leather case, care instructions, and user manual. 20″ rule, with rulers on both the upper and lower edges.
(9 Scales, 2 rulers)
Front – A, B, CO, C, D, K, [S, L, T]
Back – Factors
Stock: 1
USD $59
Full size rule, new/mint condition, features blue/white contrast markings on the slide, and red/black etched markings on the rule for easy reading.
(23 Scales, 7 cursor lines)
Front – T1, T2, DF, CF, CIF, S, C, D, (P), S, ST
Back – LL0, L, K, A, B, BI, CI, C, D, LL3, LL2, LL1
Stock: 1
USD $25
This is an unusual two-cursor rule, with metric and imperial rulers along the upper and lower edges.
(7 Scales)
Front – A, S, ST< T, D [B, C]
Back – Common formulae
Stock: 1
USD $165
Nestler Polymath Duplex Full Size Rule (new/mint), includes manual (in German).
(24 Scales, 7 cursor lines)
Front – LL01, LL02, LL03, A, B, L, K, C, D, LL3, LL2, LL1
Back – CT, T, ST, DF, CF, CIF, CI, C, D, P, S, CS
Stock: 1
USD $215
Comprehensive rule with 25 scales, in excellent condition.
( 25 Scales, 6 cursor lines)
Front – Th, K, A, B, T, ST, S, C, D, DI, SH2, SH1
Back – LL01, LL02, LL03, DF, CF, CIF, L, CI, C, D, LL3, LL2, LL1
Stock: 1
USD $95
Ivorite , full size rule, with two rulers (metric/imperial) on the upper and lower edges.
(12 Scales)
Front – K, DF, CF, L, CI, C, D, A [T, ST, S, C]
Back – Conversion factors
Stock: 1
USD $95
Inlaid wood, full size rule.
(14 Scales)
Front – K, A, B, T, ST, S, D, DI
Back – DF, CIF, CI, C, D, L
Stock: 1
USD $185
10″ Log Log Duplex Decitrig Slide Rule one of K+E’s premiere duplex rules, in the inlaid wood edge format.
(21 Scales)
Front – LL02, LL03, DF, [ CF, CIF, CI, C, ] D, LL3, LL2
Back – LL01, L, K, A [ B, T, SRT, S, ] D, DI, LL1
Stock: 1
USD $135
An extremely rare bamboo rule, featuring metric/imperial rulers on the upper and lower edges, and conversion factors on the reverse side. This rule was produced during the brief US occupation period post WWII, and is therefore marked “Made in Occupied Japan.”
(9 Scales)
Front – A, B, CI, C, D, K [S, L, T]
Back – Factors
Stock: 1
USD $185
12.5″/10″ Full Size Slide Rule complete with original embossed green slip case. Cream white Ivorite construction with black engraved scales. This is essentially a late version of the 4053 made all of Ivorite like the 4150 series pocket rules, with folded scales, and decimal trig scales related to the C and D scales.
The rule has side rulers in both cm and inches, the back has conversion factors. The rule and cursor are in excellent condition, the case is in good condition, with some folding creases at the top flaps. A very interesting rule that marked the serious shift along with the 4181 to Ivorite body design for K+E.
(12 Scales, 2 rulers)
Front – (inch) K, DF, [ CF, L, CI, C, ] D, A (cm)
Back – factors [ T, ST, S, C, ]
Stock: 3
USD $235
12″/10″ Full Size Slide Rule
K+E’s famous Deci-lon duplex rule, in very good condition, with very good orange sewn leather case, and some accessory belt loops. This is K+E’s late production flagship rule, with unbreakable cursor, Ivorite body and adjustable frame, all free of marks, names or initials. Has 8 log log scales, a split square root scale, DI and folded scales.
An outstanding and powerful rule, cleverly designed. Here’s a chance to get a wonderful rule set that will give many years of service.
(26 Scales)
Front – Ln-3, Ln-2, Ln-1, Ln-0, A, [ B, T, SRT, S, C, ] D, DI, K
Back – Sq1, Sq2, DF, [ CF, CIF, L, CI, C, ] D, Ln0, Ln1, Ln2, Ln3
Stock: 1
USD $175
10″ Log Log Duplex Vector Slide Rule one of K+E’s more unusual duplex rules, with hyperbolic trig functions. Has Th and Sh1 and Sh2 scales.
Glass cursor and unusual side engraving of the model number data. This rule was used in the electrical industry and for other vector calculations. Pre-1947 scale copyright version, not very common.
(21 Scales)
Front – L, LL1, DF, [ CF, CIF, CI, C, ] D, LL3, LL2
Back – LL0, LL00, A [ B, T, ST, S, ] D, Th, Sh2, Sh1
Stock: 1
USD $65
Jakar 88 College Duplex Full Size Rule (includes support ruler), designed for students, engineers, architects and draughtsmen.
(22 Scales)
Front – LL1, LL2, LL3, DF, CF, CIF, CI, C, D, L, K
Back – T1, T2, A, B, BI, CI, C, D, P, S, ST
Stock: 1
USD $50
Jakar 66 Electro Slide Full Size Simplex Rule (metric ruler on top edge), designed for students, engineers, architects and draughtsmen.
(13 Scales)
Front – K, E, A, B, CI, CI, D, LL3, LL2, L [S, ST, T]
Back – Blank
Stock: 1
USD $65
Faber Castell 1/48 Simplex Full Size Wood Rule, rulers on both top and bottom edges.
Stock: 1
USD $95
Faber Castell 52/82 Full Size Duplex (NIB), includes manual and supplementary ruler (in German)
(20 Scales, 4/2 Cursor Lines)
Front – A, DF, CF, CIF, CI, C, D, K [K|Z, T, P%, T, Z]
Back – L, T1, T2,S, CI, C, D, S, ST
Stock: 1
USD $110
Faber Castell 52/82 Full Size Duplex (NIB), includes manual and supplementary ruler (in German)
(20 Scales, 3 Cursor Lines)
Front – L, K, A, B, CI, C, D, LL1, LL2, LL3
Back – T1, T2, DF, CF, CIF, C, D, S, ST, P
Stock: 1
USD $125
Staedtler Mars 544 DLL, Full Size Duplex (NIB)
(23 Scales, 4/4 Cursor Lines)
Front – T1, T2, A, B, BI, CI, C, D, (P), S, ST
Reverse – LL1, LL2, LL3, DF, CF, CIF, CI, C, D, K, L, LL0
Stock: 1
USD $65
Graphoplex 694a Full Size Rule w/case and manual (in French)
(20 Scales)
Front –L, LL3, DF, CF, CIF, CI, C, D, LL2, LL1
Back – P, T>45, A, B, SRT, S, C, D, DI, K
Stock: 1
USD $120
Aristo / Charvoz – MultiLog 0970 Full Size
(24 Scales, 5 Cursor Lines)
Front – LL01, LL02, LL03, DF, CF, CIF, L, CI, C, C, LL3, LL2, LL1
Back – LL00, K, A, B, T, ST, S, C, D, DI, LL0
Stock: 2
USD $119
10″ Logarex/Koh-I-Noor Darmstadt Slide Rule VERY LATE MODEL, made in Czechoslovakia. Powerful, brand new full sized rule with front and back cm/inch edge rulers, smooth black scales, 3 log log scales on the slide reverse, pythagorean and trig scales, and 4 line cursor, and dual reverse side body cursors. Unusually marked, this rule contains ONLY scale equivalents, no arbitrary letters. Has a soft black padded leatherette case with top flap, and the name of the UK distributor for Logarex (Hellerman) embossed on one side. A very powerful and well-designed rule, but uncommon in North America. Like Pickett rules, this is lithographically made, not engraved, and has a shiny top coating for protection of the printed scales. A very nice desk rule to use for many purposes, thanks to the dual rulers. The 4 page Hellerman basic instructions are included.
(14 Scales, 4 cursor lines, 2 Rulers) (RH)
FRONT- cm/ log, sq rt(1-X2), X3, X2, [ X2, 1/X, X, ] X, sin, tg, s-t
BACK- inch/ [ e0.01X, e0.1X, eX ] Factors on the body area
Stock: 27
USD $65
A visually beautiful rule, complete with 2 part plastic case and factory box. The 544A features the trademark S/M blue slide and body braces, multi-line (5 line) cursor, plus two color (red/black) scale markings, and folded scales. The rule is self documenting on the right hand side for all scales. Staedtler-Mars rules are highly requested but quite uncommon in North America, and are very well made designs. Attractive blue slide and body braces, complement the bright blue and white two part plastic case. The folded scales are especially useful for mark-up/discount calculations, and a center index is well marked for this. The ‘invisible brace’ style with braces on the back gives the rule a very clean European look from the front.
Blank on the reverse side. These were still sealed in a factory bulk pack, so everything is in mint condition. We have included reprints of the S/M consolidated rule instructions because these came factory packed with no instructions.
(8 Scales, 5 Cursor Lines) (RH)
Front – K, DF, [ CF, CIF, CI, C, ] D, A
Back – Blank
Stock: 7
USD $340
Class C: Good condition. Some visible scale bleeding on one or both sides. The (very rare) display case is discolored, has a scratch on one end, and a crack on the other.
Considered to be the most advanced slide rule produced: gold anodized adjustable aluminum end braces, duplex 5/4-line cursor, two color (red/black) scale markings, and trademark mint green stripe on primary scales (both sides), plus additional blue stripes on the A and B scales, and massive 2 1/4″ wide body. Expanded W square root scales, for both the square root of x and 10x, 8 log log scales, and raised rubber bumpers to prevent cursor scraping, and to give the rule grip on a desktop. Body is fully alignable at the aluminum end-pieces, and provides finger grip areas on the slide for better movement. Cursor pops off (note the recess on the side bars) for easy cleaning, while retaining its alignment, a very handy feature! Rule is self documenting on right hand side for all scales. Has Pythagorean scale (P), expanded square scales, folded scales and scale over-ranges. Includes: Original box, case, original manual in Spanish, reprint manual in English, and accessory rule.
Scales include:
Front – T1, T2, K, A, DF, [ CF, B, CIF, CI, C, ] D, DI, S, ST, P
Back – LL03, LL02, LL01, LL00, W2 [ W2′, CI, L, C, W1′, ] W1, LL0, LL1, LL2, LL3
Stock: 2
USD $129
12″/10″ Full Size Duplex Trig Slide Rule
Includes special multi-decade expanded scales, capable of an astonishing 20-60 decades of dynamic range.
Eye Saver yellow aluminum construction with black and red contrasting scales, very high quality, American Made, Pickett rule. A very useful rule, ideal for many engineering tasks.
(18 Scales)
Front – K, A, [ B, T, S, CI, C, ] D, L
Back – K*, A*, [ B*, T*, S*, CI*, C*, ] D*, L*
Stock: 1
USD $85
12″/10″ Full Size Simplex Trig Slide Rule
This isa self-teaching rule, with extensive directions on the reverse side.
T (Traditional) White aluminum construction. Very high quality, American Made, Pickett rule. An excellent student rule with good trig capability, includes the original box, leather case, and instruction manual.
(9 Scales)
Front – K, A, [ B, T, S, CI, C, ] D, L
Back – instructions, fractional/decimal equivalents
Stock: 2
USD $95
12″ / 10″ Trig Slide Rule
Very nice trig rule with black and red (inverse) scales, on the yellow (Eye Saver) body. This has the split square root scales, S, T and ST, plus DI scale for more calculating power and precision. Includes black textured leather case with gold embossed Pickett logo.
(17 Scales)
Front – K, A, [ B, ST, T, S, C ], D, DI
Back – L, DF, [ CF, CIF, CI, C ], D, DI
Stock: 4
USD $159
12″ / 10″ Dual Base Log Log Speed Slide Rule
Includes original user manual and leather case. in black or tan. Dual log scale design with repeated C/D scales and DI scale for ease and speed of use.
This is a very sophisticated Log Log rule, made in the trademark adjustable aluminum body format by Pickett, an enhanced N500/800 design with added scale features.
Note that the full Pickett teacher’s manual is now on line in Adobe Acrobat PDF format HERE for you FREE!
(28 Scales)
Front – LL0-0.001, LL0+0.001, LL1+0.01, LL1-0.01, DF, [ CF, CIF, L, CI, C ], D, LL2+0.1, LL2-0.1, LL3+1.0, LL3-1.0
Back – Sq Rt1, Sq Rt2, K, A, [ B, ST, T, CI, S, C ], D, DI, DFm
Stock: 3
USD $139
12″ / 10″ Hi Log Log Duplex Slide Rule
Eye-saver yellow (ES) coated aluminum construction, black and red scales. This is a very sophisticated Log Log rule, made in the trademark aluminum body format by Pickett. Comes with original Pickett leather case.
Note that the full Pickett teacher’s manual is now on line in Adobe Acrobat PDF format HERE for you FREE!
(22 Scales)
Front – LL2+0.1, LL2-0.1, DF [ CF, CIF, L, CI, C ] D, LL3+1.0, LL3-1.0
Back – LL1+0.01, LL1-0.01, A, [ B, T, ST, S, C ] D, DI, K
Stock: 4
USD $39
This is an introductory student rule with 9 scales, and useful formulas and conversion data tables on the reverse side. Great for beginners and collectors alike.
Scales include:
Front – A, B, CI, C, D, K, S, L, T
Back – Formulas and data table
Stock: 5
USD $129
One of Pickett’s more advanced rules, this 22 scale, aluminum body rule comes in Eye-saver yellow (ES), with black and red scales. This is a very sophisticated Log Log rule, made in the trademark aluminum body format by Pickett. The original case on this rule has some wear and damage, but does come with the belt loop accessory.
Scales include:
Front – LL2+0.1, LL2-0.1, DF [ CF, CIF, L, CI, C ] D, LL3+1.0, LL3-1.0
Back – LL1+0.01, LL1-0.01, A, [ B, T, ST, S, C ] D, DI, K
Stock: 1
USD $165
Class D(ish): What happens when you have a rule of this type that’s missing a box and some other items, that’s not quite a Class D, but isn’t quite a Class E? The result? The Dish Class. Reasonable condition. Visible/pronounced scale bleeding on both sides, the case on this rule isn’t as nice as a full Class D, but it’s also on sale…
Faber Castell’s advanced duplex log log rule, widely used in Europe but seldom seen in North America, This rule has a plastic body with adjustable gold anodized aluminum end braces, black and red filled and engraved scales, plus green accent stripes. This is a powerful design with the Rietz overrange scale extensions, Pythagorean scale (P) 6 log log scales and w and W’ expanded square root scales. Scales are sall self-documenting on the right hand side, and the rule has a 5/6 line cursor.
Scales include:
Front – T1, T2, K, DF, [ CF, CIF, CI, C, ] D, S, ST, P
Back – LL03, LL02, LL01, W2 [ W2′, L, C, W1′, ] W1, LL1, LL2, LL3
Stock: 1
USD $49
This is an advance 24 scale rule, that features feet on both sides of the rule for easy desktop use, and a cursor with 6 markers. As with most Aristo rules, it comes with black and red scales, as well as yellow bands on the slide for easier reading.
This rule has pronounced discoloration on both sides, but is still in very usable condition.
Scales include:
Front – LL01, LL02, LL03, DF, CF, CIF, L, CI, C, D, LL3, LL2, LL1
Reverse – LL00, K, A, B, T, ST, S, C, D, DI, LL0
Stock: 1
USD $95
An excellent full sized Trig rule, great for high school students. All scales are self documenting on the right hand side. Nestler’s late production style duplex rule. BRAND NEW rule, with 2 part plastic case. Has normal and folded basic scales (at 3), expanded trig scales, and a 6 line cursor. Has green body supports, and a pale green stripe on the entire slide (both sides), and black and red filled/ engraved scales.
Scales include:
Front – K, A, [ B, CI, C, ] D, L
Reverse – T1, T2, DF, [ CF, CIF, CI, C, ] D, S, ST
Stock: 2
USD $35
This is an excellent starter rule which features additional markings on the scales to help explain the core functions of multiplication and division.
Scales include:
Front – A, B, CI, C, D, K, S, L, T
Back – Blank
Stock: 3
USD $175
This is a very sophisticated 34 scale rule, made in the trademark aluminum body format by Pickett, an extremely powerful but somewhat crowded rule. Has hyperbolic scales, expanded trig, square and cube root scales, DI and two types of folded scales. Comes with the original brown leather case.
Scales include:
Front – LL1+.000, LL1-.000, LL2+.00, LL2-.00, DF/m, [ CF/m, TH, SH, SH, L, CI, C, ] LL3+.0, LL3-.0, LL4+0., LL4-0.
Back – 3 cube root scales, DF [ CF, CIF, T, T, ST, S, CI, C, ] D, DI, 2 square root scales
Stock: 2
USD $29
An economical and practical student rule for the beginner slide rule enthusiast! Plastic body, with contrast color slide for easier reading. Comes with a leatherette case.
Scales include:
Front – L, K, A, B, CI, C, D, ST, T, S
Back – Blank
Stock: 2
USD $25
A clear and easy to read student rule, with yellow (taupe?) contrast bands on the rule for easier reading. Includes a leatherette case.
Scales include:
Front – A, DF, CF, CIF, CI, C, D, K
Back – Blank
Stock: 2
USD $29
An economical and practical student rule for the beginner slide rule enthusiast! Plastic body, with contrast color slide for easier reading.
Scales include:
Front – L, A, DF, CF, CI, C, D, ST, T, S
Back – Blank
Stock: 1
USD $195
Very good condition log log duplex rule, with hyperbolic sine and tangent scales, additional vector/radian engineering scales, and inverted sine/tangent scales. Has folded scales, extended/inverted trig scales, and 3 log log scales. A very nice high end bamboo duplex rule, with a very uncommon scale set.
This rule comes with its factory box, and carton slip case.
Scales include:
Front – Sh1, Sh2, Th, A, [ B, TI1, TI2, SI, C, ] D, DI, x, theta
Back – L, K, DF, [ CF, CIF, CI, C, ] D, LL3, LL2, LL1
Stock: 2
USD $195
Log log duplex rule, similar to the POST Versalog, but with both A and B scales. Has folded and extended trig scales, and 8 log log scales. A very nice high end bamboo duplex rule, and one of Hemmi’s most popular models outside North America. This specific rule comes with the original factory box, and carton slide case instead of the leather case. THere is also one in stock with only the rule case and manual, but no box.
Scales include:
Front – LL/1 (e-0.01<-0.1), LL/2 (e-0.1<-1.0), LL/3 (e-1.0<-10), DF, [ CF, CIF, CI, C, ] D, LL3 (e+1>10), LL2 (e+0.1>1.0), LL1 (e+.01>.1).
Back – L, K, A, [ B, T, S, ST, C, ] D, DI, LL0 (e+.001>.01), LL/0
Stock: 2
USD $275
Class D (reduced from USD$325): Reasonable condition. Visible/pronounced scale bleeding on both sides, case may have considerable dark spots and/or discoloration.
Considered to be the most advanced slide rule produced: gold anodized adjustable aluminum end braces, duplex 5/4-line cursor, two color (red/black) scale markings, and trademark mint green stripe on primary scales (both sides), plus additional blue stripes on the A and B scales, and massive 2 1/4″ wide body. Expanded W square root scales, for both the square root of x and 10x, 8 log log scales, and raised rubber bumpers to prevent cursor scraping, and to give the rule grip on a desktop. Body is fully alignable at the aluminum end-pieces, and provides finger grip areas on the slide for better movement. Cursor pops off (note the recess on the side bars) for easy cleaning, while retaining its alignment, a very handy feature! Rule is self documenting on right hand side for all scales. Has Pythagorean scale (P), expanded square scales, folded scales and scale over-ranges.
This specific rule comes in a rare FC slide box, as opposed to the standard leather case.
Scales include:
Front – T1, T2, K, A, DF, [ CF, B, CIF, CI, C, ] D, DI, S, ST, P
Back – LL03, LL02, LL01, LL00, W2 [ W2′, CI, L, C, W1′, ] W1, LL0, LL1, LL2, LL3
Stock: 10
USD $45
This may be a more basic rule for students, but it still has a variety of very useful features. It has a metric ruler on the upper edge of the rule, high contrast green scale accents, and black and red scales.
Scales include:
Front – K, A, B, L, CI, C, D, S, ST, T1, T2
Back – blank
Stock: 3
USD $69
ES (Eye-Saver) Yellow aluminum construction, high-quality American made, Pickett rule. An excellent student rule with good trig capability, that never loses its instruction manual (it’s printed on the back).
Scales include:
Front – K, A, [ B, T, S, CI, C, ] D, L
Back – instructions, fractional/decimal equivalents
Stock: 13
USD $75
One side of the case may say Teledyne Post, but the other definitely says Hemmi. This is a beginner, single sided rule, that features feet on the reverse side for easier desktop use. We’ve only got one manual in stock, so not all rules come with manuals.
Scales include:
Front – T, K, A, B, CI, C, D, L, S, ST
Back – Blank
Stock: 3
USD $115
Easy to read with black and red scales, this is a good beginner rule that includes a metric ruler on the upper edge.
Scales include:
Front – K, A, B, CI, C, D, L, S, ST, T
Back – Blank
Stock: 1
USD $275
K+E’s famous Deci-Lon duplex rule, in very good condition. These cases are slightly different, being stitched/formed leather, as opposed to a folded/stitched leather case. Does not include any supplementary sheets or documents. This is K+E’s late production flagship rule, with unbreakable cursor, Ivorite body and adjustable frame, all free of marks, names or initials. Has 8 log log scales, a split square root scale, DI and folded scales. An outstanding and powerful rule, cleverly designed.
Scales include:
Front – Ln-3, Ln-2, Ln-1, Ln-0, A, [ B, T, SRT, S, C, ] D, DI, K
Back – Sq1, Sq2, DF, [ CF, CIF, L, CI, C, ] D, Ln0, Ln1, Ln2, Ln3
Stock: 6
USD $75
An advanced 24 scale rule that comes in a presentation case, rule features feet on the reverse side for easier desktop use.
Scales include:
Front – ST, T, T2, DF, CF, CIF, CI, C, D, DI, P, S
Back – LL01, LL02, LL03, A, B, L, K, C, D, LL3, LL2, LL1
Stock: 1
USD $275
K+E’s famous Deci-Lon duplex rule, in very good condition, with very good orange sewn leather case, and supplementary instruction/formula sheets. This is K+E’s late production flagship rule, with unbreakable cursor, Ivorite body and adjustable frame, all free of marks, names or initials. Has 8 log log scales, a split square root scale, DI and folded scales. An outstanding and powerful rule, cleverly designed.
Scales include:
Front – Ln-3, Ln-2, Ln-1, Ln-0, A, [ B, T, SRT, S, C, ] D, DI, K
Back – Sq1, Sq2, DF, [ CF, CIF, L, CI, C, ] D, Ln0, Ln1, Ln2, Ln3
Stock: 1
USD $149
This 12 scale rule includes its original box and manual, and the rule features feet on the reverse side to enable easier desktop use.
Scales include:
Front – LL01, LL02, LL03, DF, CF, CIF, CI, C, D, LL3, LL2, LL1
Back – T, ST, K, A, B, BI, CI, C, D, L, P, S
Stock: 1
USD $69
This beginner bamboo rule features a metric ruler on the upper edge of the rule, and an imperial rule on the lower edge.
Front – K, A, B, CI, C, D, L, S, ST, T
Back – Reference data and usage instructions
Stock: 1
USD $175
Powerful, new full sized rule with leather case, engraved black/red scales, adjustable bamboo body, framed glass cursor. An uncommon and useful rule.
Operating manual can be downloaded here.
Scales include:
Front – db, Neper, DF [ CF, CIF, CI, C, ] D, LL3, LL2, LL1
Back – A, L, [ C, SI, TI ] D, Lambda, F
Stock: 1
USD $425
Class A (reduced from USD$495): Excellent/mint condition. Green cases may have some small dark spots/discoloration, brown cases have no discoloration. May have some minor scale bleeding on the reverse side of the rule (non-color side).
Considered to be the most advanced slide rule produced: gold anodized adjustable aluminum end braces, duplex 5/4-line cursor, two color (red/black) scale markings, and trademark mint green stripe on primary scales (both sides), plus additional blue stripes on the A and B scales, and massive 2 1/4″ wide body. Expanded W square root scales, for both the square root of x and 10x, 8 log log scales, and raised rubber bumpers to prevent cursor scraping, and to give the rule grip on a desktop. Body is fully alignable at the aluminum end-pieces, and provides finger grip areas on the slide for better movement. Cursor pops off (note the recess on the side bars) for easy cleaning, while retaining its alignment, a very handy feature! Rule is self documenting on right hand side for all scales. Has Pythagorean scale (P), expanded square scales, folded scales and scale over-ranges. Includes: Original box, case, original manual in Spanish, reprint manual in English, and accessory rule.
Scales include:
Front – T1, T2, K, A, DF, [ CF, B, CIF, CI, C, ] D, DI, S, ST, P
Back – LL03, LL02, LL01, LL00, W2 [ W2′, CI, L, C, W1′, ] W1, LL0, LL1, LL2, LL3
Stock: 2
USD $425
Class A (reduced from USD$495): Excellent/mint condition. Green cases may have some small dark spots/discoloration, brown cases have no discoloration. May have some minor scale bleeding on the reverse side of the rule (non-color side).
Considered to be the most advanced slide rule produced: gold anodized adjustable aluminum end braces, duplex 5/4-line cursor, two color (red/black) scale markings, and trademark mint green stripe on primary scales (both sides), plus additional blue stripes on the A and B scales, and massive 2 1/4″ wide body. Expanded W square root scales, for both the square root of x and 10x, 8 log log scales, and raised rubber bumpers to prevent cursor scraping, and to give the rule grip on a desktop. Body is fully alignable at the aluminum end-pieces, and provides finger grip areas on the slide for better movement. Cursor pops off (note the recess on the side bars) for easy cleaning, while retaining its alignment, a very handy feature! Rule is self documenting on right hand side for all scales. Has Pythagorean scale (P), expanded square scales, folded scales and scale over-ranges. Includes: Original box, case, original manual in Spanish, reprint manual in English, and accessory rule.
Scales include:
Front – T1, T2, K, A, DF, [ CF, B, CIF, CI, C, ] D, DI, S, ST, P
Back – LL03, LL02, LL01, LL00, W2 [ W2′, CI, L, C, W1′, ] W1, LL0, LL1, LL2, LL3
Stock: 1
USD $375
Class B (reduced from USD$425): Very good condition. Green cases may have some dark spots/discoloration. Some scale bleeding on reverse side (not the full color side) of the rule.
Considered to be the most advanced slide rule produced: gold anodized adjustable aluminum end braces, duplex 5/4-line cursor, two color (red/black) scale markings, and trademark mint green stripe on primary scales (both sides), plus additional blue stripes on the A and B scales, and massive 2 1/4″ wide body. Expanded W square root scales, for both the square root of x and 10x, 8 log log scales, and raised rubber bumpers to prevent cursor scraping, and to give the rule grip on a desktop. Body is fully alignable at the aluminum end-pieces, and provides finger grip areas on the slide for better movement. Cursor pops off (note the recess on the side bars) for easy cleaning, while retaining its alignment, a very handy feature! Rule is self documenting on right hand side for all scales. Has Pythagorean scale (P), expanded square scales, folded scales and scale over-ranges. Includes: Original box, case, original manual in Spanish, reprint manual in English, and accessory rule.
Scales include:
Front – T1, T2, K, A, DF, [ CF, B, CIF, CI, C, ] D, DI, S, ST, P
Back – LL03, LL02, LL01, LL00, W2 [ W2′, CI, L, C, W1′, ] W1, LL0, LL1, LL2, LL3
Stock: 9
USD $375
Class B (reduced from USD$425): Very good condition. Green cases may have some dark spots/discoloration. Some scale bleeding on reverse side (not the full color side) of the rule.
Considered to be the most advanced slide rule produced: gold anodized adjustable aluminum end braces, duplex 5/4-line cursor, two color (red/black) scale markings, and trademark mint green stripe on primary scales (both sides), plus additional blue stripes on the A and B scales, and massive 2 1/4″ wide body. Expanded W square root scales, for both the square root of x and 10x, 8 log log scales, and raised rubber bumpers to prevent cursor scraping, and to give the rule grip on a desktop. Body is fully alignable at the aluminum end-pieces, and provides finger grip areas on the slide for better movement. Cursor pops off (note the recess on the side bars) for easy cleaning, while retaining its alignment, a very handy feature! Rule is self documenting on right hand side for all scales. Has Pythagorean scale (P), expanded square scales, folded scales and scale over-ranges. Includes: Original box, case, original manual in Spanish, reprint manual in English, and accessory rule.
Scales include:
Front – T1, T2, K, A, DF, [ CF, B, CIF, CI, C, ] D, DI, S, ST, P
Back – LL03, LL02, LL01, LL00, W2 [ W2′, CI, L, C, W1′, ] W1, LL0, LL1, LL2, LL3
Stock: 4
USD $325
Class C (reduced from USD$375): Good condition. Some visible scale bleeding on one or both sides. Some dark spots or discoloration on case.
Considered to be the most advanced slide rule produced: gold anodized adjustable aluminum end braces, duplex 5/4-line cursor, two color (red/black) scale markings, and trademark mint green stripe on primary scales (both sides), plus additional blue stripes on the A and B scales, and massive 2 1/4″ wide body. Expanded W square root scales, for both the square root of x and 10x, 8 log log scales, and raised rubber bumpers to prevent cursor scraping, and to give the rule grip on a desktop. Body is fully alignable at the aluminum end-pieces, and provides finger grip areas on the slide for better movement. Cursor pops off (note the recess on the side bars) for easy cleaning, while retaining its alignment, a very handy feature! Rule is self documenting on right hand side for all scales. Has Pythagorean scale (P), expanded square scales, folded scales and scale over-ranges. Includes: Original box, case, original manual in Spanish, reprint manual in English, and accessory rule.
Scales include:
Front – T1, T2, K, A, DF, [ CF, B, CIF, CI, C, ] D, DI, S, ST, P
Back – LL03, LL02, LL01, LL00, W2 [ W2′, CI, L, C, W1′, ] W1, LL0, LL1, LL2, LL3
Stock: 8
USD $325
Class C (reduced from USD$375): Good condition. Some visible scale bleeding on one or both sides. Some dark spots or discoloration on case.
Considered to be the most advanced slide rule produced: gold anodized adjustable aluminum end braces, duplex 5/4-line cursor, two color (red/black) scale markings, and trademark mint green stripe on primary scales (both sides), plus additional blue stripes on the A and B scales, and massive 2 1/4″ wide body. Expanded W square root scales, for both the square root of x and 10x, 8 log log scales, and raised rubber bumpers to prevent cursor scraping, and to give the rule grip on a desktop. Body is fully alignable at the aluminum end-pieces, and provides finger grip areas on the slide for better movement. Cursor pops off (note the recess on the side bars) for easy cleaning, while retaining its alignment, a very handy feature! Rule is self documenting on right hand side for all scales. Has Pythagorean scale (P), expanded square scales, folded scales and scale over-ranges. Includes: Original box, case, original manual in Spanish, reprint manual in English, and accessory rule.
Scales include:
Front – T1, T2, K, A, DF, [ CF, B, CIF, CI, C, ] D, DI, S, ST, P
Back – LL03, LL02, LL01, LL00, W2 [ W2′, CI, L, C, W1′, ] W1, LL0, LL1, LL2, LL3
Stock: 2
USD $275
Class D (reduced from USD$325): Reasonable condition. Visible/pronounced scale bleeding on both sides, case may have considerable dark spots and/or discoloration.
Considered to be the most advanced slide rule produced: gold anodized adjustable aluminum end braces, duplex 5/4-line cursor, two color (red/black) scale markings, and trademark mint green stripe on primary scales (both sides), plus additional blue stripes on the A and B scales, and massive 2 1/4″ wide body. Expanded W square root scales, for both the square root of x and 10x, 8 log log scales, and raised rubber bumpers to prevent cursor scraping, and to give the rule grip on a desktop. Body is fully alignable at the aluminum end-pieces, and provides finger grip areas on the slide for better movement. Cursor pops off (note the recess on the side bars) for easy cleaning, while retaining its alignment, a very handy feature! Rule is self documenting on right hand side for all scales. Has Pythagorean scale (P), expanded square scales, folded scales and scale over-ranges. Includes: Original box, case, original manual in Spanish, reprint manual in English, and accessory rule.
Scales include:
Front – T1, T2, K, A, DF, [ CF, B, CIF, CI, C, ] D, DI, S, ST, P
Back – LL03, LL02, LL01, LL00, W2 [ W2′, CI, L, C, W1′, ] W1, LL0, LL1, LL2, LL3
Stock: 12
USD $275
Class D (reduced from USD$325): Reasonable condition. Visible/pronounced scale bleeding on both sides, case may have considerable dark spots and/or discoloration.
Considered to be the most advanced slide rule produced: gold anodized adjustable aluminum end braces, duplex 5/4-line cursor, two color (red/black) scale markings, and trademark mint green stripe on primary scales (both sides), plus additional blue stripes on the A and B scales, and massive 2 1/4″ wide body. Expanded W square root scales, for both the square root of x and 10x, 8 log log scales, and raised rubber bumpers to prevent cursor scraping, and to give the rule grip on a desktop. Body is fully alignable at the aluminum end-pieces, and provides finger grip areas on the slide for better movement. Cursor pops off (note the recess on the side bars) for easy cleaning, while retaining its alignment, a very handy feature! Rule is self documenting on right hand side for all scales. Has Pythagorean scale (P), expanded square scales, folded scales and scale over-ranges. Includes: Original box, case, original manual in Spanish, reprint manual in English, and accessory rule.
Scales include:
Front – T1, T2, K, A, DF, [ CF, B, CIF, CI, C, ] D, DI, S, ST, P
Back – LL03, LL02, LL01, LL00, W2 [ W2′, CI, L, C, W1′, ] W1, LL0, LL1, LL2, LL3
Stock: 3
USD $125
Class E: Poor condition. Extensive scale bleeding and discoloration on one or both sides. Case may have considerable dark spots and discoloration.
Considered to be the most advanced slide rule produced: gold anodized adjustable aluminum end braces, duplex 5/4-line cursor, two color (red/black) scale markings, and trademark mint green stripe on primary scales (both sides), plus additional blue stripes on the A and B scales, and massive 2 1/4″ wide body. Expanded W square root scales, for both the square root of x and 10x, 8 log log scales, and raised rubber bumpers to prevent cursor scraping, and to give the rule grip on a desktop. Body is fully alignable at the aluminum end-pieces, and provides finger grip areas on the slide for better movement. Cursor pops off (note the recess on the side bars) for easy cleaning, while retaining its alignment, a very handy feature! Rule is self documenting on right hand side for all scales. Has Pythagorean scale (P), expanded square scales, folded scales and scale over-ranges. Includes: Original box, case, original manual in Spanish, reprint manual in English, and accessory rule.
Scales include:
Front – T1, T2, K, A, DF, [ CF, B, CIF, CI, C, ] D, DI, S, ST, P
Back – LL03, LL02, LL01, LL00, W2 [ W2′, CI, L, C, W1′, ] W1, LL0, LL1, LL2, LL3
Stock: 1
USD $125
Class E: Poor condition. Extensive scale bleeding and discoloration on one or both sides. Case may have considerable dark spots and discoloration.
Considered to be the most advanced slide rule produced: gold anodized adjustable aluminum end braces, duplex 5/4-line cursor, two color (red/black) scale markings, and trademark mint green stripe on primary scales (both sides), plus additional blue stripes on the A and B scales, and massive 2 1/4″ wide body. Expanded W square root scales, for both the square root of x and 10x, 8 log log scales, and raised rubber bumpers to prevent cursor scraping, and to give the rule grip on a desktop. Body is fully alignable at the aluminum end-pieces, and provides finger grip areas on the slide for better movement. Cursor pops off (note the recess on the side bars) for easy cleaning, while retaining its alignment, a very handy feature! Rule is self documenting on right hand side for all scales. Has Pythagorean scale (P), expanded square scales, folded scales and scale over-ranges. Includes: Original box, case, original manual in Spanish, reprint manual in English, and accessory rule.
Scales include:
Front – T1, T2, K, A, DF, [ CF, B, CIF, CI, C, ] D, DI, S, ST, P
Back – LL03, LL02, LL01, LL00, W2 [ W2′, CI, L, C, W1′, ] W1, LL0, LL1, LL2, LL3
Stock: 2
USD $195
Long before Samsung was trying to sneak a stylus into their smartphones, Faber Castell was already concealing them in their slide rules. This is a very rare surviving example of one of those rules, that features a small stylus that is concealed in the upper left corner of the rule, and can be slid out to operate the addiator integrated into the back of the rule. Rule features an imperial ruler on the upper edge, and a metric ruler on the lower edge.
Scales include:
Front – 7 scales (+ Cos, ST, T scales on the reverse side of the slide)
Back – Addiator and unit conversion instructions.
Stock: 1
USD $35
This is a more basic rule that is more geared towards drafting and surveying. It features 12 scales (two along the lower vertical edge of the rule), and a metric ruler along the upper edge of the rule.
Scales include:
Front – Scale identification not clear, but it does include C, D, S, T, ST
Back – Reference formulae and data (in German)
Stock: 1
USD $75
This is a rule designed more for beginners, and incorporates a variety of useful features. It includes metric rulers on both the upper and lower edges of the rule, however, the ruler on the lower edge places the “0” mark in the center of the rule with markings increasing outwards towards each end of the rule.
Scales include:
Front – K, A, B, BI, CI, C, D, DI, L, T2, T1, ST, S
Back – Unit conversion table, formula references, and usage instructions
Stock: 1
USD $85
This is a very unusual vintage wood rule from Nestler, which features a metric ruler along the upper edge of the rule, and two supplementary scales along the lower vertical edge, read out using a small lens fixed to the lower edge of the main cursor.
Scales include:
Front – Unsure on exact nomenclature of certain scales, but there are 9 scales including the two on lower edge of the ruler, and the following on the reverse side of the slide: S, S&T, T
Back – Constants and data tables (in German)
Stock: 1
USD $39
New and in mint condition, made in Czechoslovakia. A great beginner and student rule.
Basic Rietz format rule (has over-range scale extensions for easier operation) with added reference features. It has a black/red self-documenting scale arrangement and pale yellow slide. The slide reverse has trig (S, ST, T) scales, and the back has a treasure trove of useful data and factors. It has a slightly magnifying multi-line simplex cursor design that does area of a circle, plus some other interesting stuff like horsepower conversion. These are beautifully made rules, very well constructed. We will include basic instruction reprints, as these came bulk packed with with no manuals.
Stock: LOTS!
USD $165
This all plastic rule features 25 scales, and has rubberized feet to keep the rule fixed in place for desktop use. This rule includes the rule, original case, and conversion/formula table.
Scales are as follows:
Front – LL01, LL02, LL03, DF, CF, CIF, K, CI, C, D, LL3, LL2, LL1
Back – LL00, L, T>45, A, B, T<45, SRT, S, C, D, P, DI, LL0
Stock: 1
USD $65
This bamboo, nine scale, full size rule features imperial and metric rulers on the upper and lower edges of the rule. Includes original box, manual, and case.
Scales include:
Front – L, D, 360, C, D, A, S, S&T, T
Back – Formulas, data tables
Stock: 1
USD $225
Don’t let the box fool you, this rule is in excellent shape and is still in its sealed factory plastic. It features 24 scales, and is a rule for advanced users.
Scales include:
Front – L, F, K, A, B, K’, CI, C, D, LL3, LL2, LL1
Back – CL, SL, M, TL, R, ST, T, S, C, D, DI, SIN/COS
Stock: 1
USD $85
This all-metal 23-scale rule has some unique features. The reverse side of the rule features a split scale, with instructions outlined in the centre of the rule, and positive values read on the left end of the scale, and negative values on the right.
Scales are as follows:
Front – ^-3, ^-3, ^-3, L, T, T, ST< S, CI, C, D, ^-2, ^-2
Back – C, D, T’, T’, ST’, S’, DN, RN-DZ, ^-2, ^-3
Stock: 1
USD $30
This 13-scale full size rule features large, color contrasted scale for easy reading, and operating instructions printed on the reverse side of the rule. Includes the original case and operating instructions (in German).
Scales are as follows:
Front – A, DF, CF, CIF, CI, C, D, kW, k
Back – Z’, N’, Z, N, instructions
Stock: 1
USD $35
This 13-scale full size rule features large, color contrasted scale for easy reading, and operating instructions printed on the reverse side of the rule. Includes the original case, box, and operating instructions (in German).
Scales are as follows:
Front – A, DF, CF, CIF, CI, C, D, kW, k
Back – Z’, N’, Z, N, instructions
Stock: 1
Sphere Research Corporation